625153987 has 2 divisors, whose sum is σ = 625153988. Its totient is φ = 625153986.

The previous prime is 625153981. The next prime is 625154009. The reversal of 625153987 is 789351526.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-625153987 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (625153981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 312576993 + 312576994.

It is an arithmetic number, because the mean of its divisors is an integer number (312576994).

Almost surely, 2^625153987 is an apocalyptic number.

625153987 is a deficient number, since it is larger than the sum of its proper divisors (1).

625153987 is an equidigital number, since it uses as much as digits as its factorization.

625153987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 453600, while the sum is 46.

The square root of 625153987 is about 25003.0795503274. The cubic root of 625153987 is about 855.0581846568.

The spelling of 625153987 in words is "six hundred twenty-five million, one hundred fifty-three thousand, nine hundred eighty-seven".