625687001 has 2 divisors, whose sum is σ = 625687002. Its totient is φ = 625687000.

The previous prime is 625686991. The next prime is 625687037. The reversal of 625687001 is 100786526.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 470933401 + 154753600 = 21701^2 + 12440^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-625687001 is a prime.

It is not a weakly prime, because it can be changed into another prime (625687061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 312843500 + 312843501.

It is an arithmetic number, because the mean of its divisors is an integer number (312843501).

Almost surely, 2^625687001 is an apocalyptic number.

It is an amenable number.

625687001 is a deficient number, since it is larger than the sum of its proper divisors (1).

625687001 is an equidigital number, since it uses as much as digits as its factorization.

625687001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 625687001 is about 25013.7362463107. The cubic root of 625687001 is about 855.3011266762.

The spelling of 625687001 in words is "six hundred twenty-five million, six hundred eighty-seven thousand, one".