1299720133 has 8 divisors (see below), whose sum is σ = 1371470400. Its totient is φ = 1229239968.

The previous prime is 1299720101. The next prime is 1299720151. The reversal of 1299720133 is 3310279921.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1299720133 - 2⁵ = 1299720101 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1299720092 and 1299720101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1299720733) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 315423 + ... + 319516.

It is an arithmetic number, because the mean of its divisors is an integer number (171433800).

Almost surely, 2^1299720133 is an apocalyptic number.

It is an amenable number.

1299720133 is a deficient number, since it is larger than the sum of its proper divisors (71750267).

1299720133 is an equidigital number, since it uses as much as digits as its factorization.

1299720133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 635051.

The product of its (nonzero) digits is 20412, while the sum is 37.

The square root of 1299720133 is about 36051.6314887413. The cubic root of 1299720133 is about 1091.3145582474.

The spelling of 1299720133 in words is "one billion, two hundred ninety-nine million, seven hundred twenty thousand, one hundred thirty-three".