1299163477 has 4 divisors (see below), whose sum is σ = 1375584876. Its totient is φ = 1222742080.

The previous prime is 1299163471. The next prime is 1299163483. The reversal of 1299163477 is 7743619921.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1299163471) and next prime (1299163483).

It can be written as a sum of positive squares in 2 ways, for example, as 1057485361 + 241678116 = 32519^2 + 15546^2 .

It is a cyclic number.

It is not a de Polignac number, because 1299163477 - 2¹⁵ = 1299130709 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1299163477.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1299163471) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38210674 + ... + 38210707.

It is an arithmetic number, because the mean of its divisors is an integer number (343896219).

Almost surely, 2^1299163477 is an apocalyptic number.

1299163477 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

1299163477 is a deficient number, since it is larger than the sum of its proper divisors (76421399).

1299163477 is an equidigital number, since it uses as much as digits as its factorization.

1299163477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76421398.

The product of its digits is 571536, while the sum is 49.

The square root of 1299163477 is about 36043.9104010650. The cubic root of 1299163477 is about 1091.1587366135.

The spelling of 1299163477 in words is "one billion, two hundred ninety-nine million, one hundred sixty-three thousand, four hundred seventy-seven".