125617769 has 2 divisors, whose sum is σ = 125617770. Its totient is φ = 125617768.

The previous prime is 125617753. The next prime is 125617771. The reversal of 125617769 is 967716521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 124434025 + 1183744 = 11155^2 + 1088^2 .

It is a cyclic number.

It is not a de Polignac number, because 125617769 - 2⁴ = 125617753 is a prime.

It is a super-2 number, since 2×125617769² = 31559647777074722, which contains 22 as substring.

Together with 125617771, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (125617729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62808884 + 62808885.

It is an arithmetic number, because the mean of its divisors is an integer number (62808885).

Almost surely, 2^125617769 is an apocalyptic number.

It is an amenable number.

125617769 is a deficient number, since it is larger than the sum of its proper divisors (1).

125617769 is an equidigital number, since it uses as much as digits as its factorization.

125617769 is an evil number, because the sum of its binary digits is even.

The product of its digits is 158760, while the sum is 44.

The square root of 125617769 is about 11207.9333063683. The cubic root of 125617769 is about 500.8223387764.

The spelling of 125617769 in words is "one hundred twenty-five million, six hundred seventeen thousand, seven hundred sixty-nine".