15763997 has 2 divisors, whose sum is σ = 15763998. Its totient is φ = 15763996.

The previous prime is 15763973. The next prime is 15763999. The reversal of 15763997 is 79936751.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14638276 + 1125721 = 3826^2 + 1061^2 .

It is a cyclic number.

It is not a de Polignac number, because 15763997 - 2²² = 11569693 is a prime.

Together with 15763999, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15763999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7881998 + 7881999.

It is an arithmetic number, because the mean of its divisors is an integer number (7881999).

Almost surely, 2^15763997 is an apocalyptic number.

It is an amenable number.

15763997 is a deficient number, since it is larger than the sum of its proper divisors (1).

15763997 is an equidigital number, since it uses as much as digits as its factorization.

15763997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 357210, while the sum is 47.

The square root of 15763997 is about 3970.3900312186. The cubic root of 15763997 is about 250.7391299276.

The spelling of 15763997 in words is "fifteen million, seven hundred sixty-three thousand, nine hundred ninety-seven".