1351999999 has 8 divisors (see below), whose sum is σ = 1545850880. Its totient is φ = 1158326136.

The previous prime is 1351999997. The next prime is 1352000011. The reversal of 1351999999 is 9999991531.

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

It is a cyclic number.

It is not a de Polignac number, because 1351999999 - 2¹ = 1351999997 is a prime.

1351999999 is a modest number, since divided by 99999 gives 13519 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 1351999999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1351999997) 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, 27459 + ... + 58804.

It is an arithmetic number, because the mean of its divisors is an integer number (193231360).

Almost surely, 2^1351999999 is an apocalyptic number.

1351999999 is a deficient number, since it is larger than the sum of its proper divisors (193850881).

1351999999 is an equidigital number, since it uses as much as digits as its factorization.

1351999999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88509.

The product of its digits is 7971615, while the sum is 64.

The square root of 1351999999 is about 36769.5526081023. The cubic root of 1351999999 is about 1105.7549624632.

The spelling of 1351999999 in words is "one billion, three hundred fifty-one million, nine hundred ninety-nine thousand, nine hundred ninety-nine".