15238677997 has 2 divisors, whose sum is σ = 15238677998. Its totient is φ = 15238677996.

The previous prime is 15238677983. The next prime is 15238678087. The reversal of 15238677997 is 79977683251.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11843751241 + 3394926756 = 108829^2 + 58266^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15238677997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15238677197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7619338998 + 7619338999.

It is an arithmetic number, because the mean of its divisors is an integer number (7619338999).

Almost surely, 2^15238677997 is an apocalyptic number.

It is an amenable number.

15238677997 is a deficient number, since it is larger than the sum of its proper divisors (1).

15238677997 is an equidigital number, since it uses as much as digits as its factorization.

15238677997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40007520, while the sum is 64.

The spelling of 15238677997 in words is "fifteen billion, two hundred thirty-eight million, six hundred seventy-seven thousand, nine hundred ninety-seven".