125635669 has 2 divisors, whose sum is σ = 125635670. Its totient is φ = 125635668.

The previous prime is 125635667. The next prime is 125635703. The reversal of 125635669 is 966536521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 119574225 + 6061444 = 10935^2 + 2462^2 .

It is a cyclic number.

It is not a de Polignac number, because 125635669 - 2¹ = 125635667 is a prime.

It is a super-2 number, since 2×125635669² = 31568642650155122, which contains 22 as substring.

Together with 125635667, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125635663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62817834 + 62817835.

It is an arithmetic number, because the mean of its divisors is an integer number (62817835).

Almost surely, 2^125635669 is an apocalyptic number.

It is an amenable number.

125635669 is a deficient number, since it is larger than the sum of its proper divisors (1).

125635669 is an equidigital number, since it uses as much as digits as its factorization.

125635669 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 291600, while the sum is 43.

The square root of 125635669 is about 11208.7318194343. The cubic root of 125635669 is about 500.8461260006.

The spelling of 125635669 in words is "one hundred twenty-five million, six hundred thirty-five thousand, six hundred sixty-nine".