999157289407 has 2 divisors, whose sum is σ = 999157289408. Its totient is φ = 999157289406.

The previous prime is 999157289381. The next prime is 999157289413. The reversal of 999157289407 is 704982751999.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-999157289407 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999157289447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499578644703 + 499578644704.

It is an arithmetic number, because the mean of its divisors is an integer number (499578644704).

Almost surely, 2^999157289407 is an apocalyptic number.

999157289407 is a deficient number, since it is larger than the sum of its proper divisors (1).

999157289407 is an equidigital number, since it uses as much as digits as its factorization.

999157289407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 102876480, while the sum is 70.

The spelling of 999157289407 in words is "nine hundred ninety-nine billion, one hundred fifty-seven million, two hundred eighty-nine thousand, four hundred seven".