625952491 has 2 divisors, whose sum is σ = 625952492. Its totient is φ = 625952490.

The previous prime is 625952489. The next prime is 625952497. The reversal of 625952491 is 194259526.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 625952491 - 2¹ = 625952489 is a prime.

Together with 625952489, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (625952497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 312976245 + 312976246.

It is an arithmetic number, because the mean of its divisors is an integer number (312976246).

Almost surely, 2^625952491 is an apocalyptic number.

625952491 is a deficient number, since it is larger than the sum of its proper divisors (1).

625952491 is an equidigital number, since it uses as much as digits as its factorization.

625952491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 194400, while the sum is 43.

The square root of 625952491 is about 25019.0425676124. The cubic root of 625952491 is about 855.4220826740.

The spelling of 625952491 in words is "six hundred twenty-five million, nine hundred fifty-two thousand, four hundred ninety-one".