1625520697 has 2 divisors, whose sum is σ = 1625520698. Its totient is φ = 1625520696.

The previous prime is 1625520649. The next prime is 1625520713. The reversal of 1625520697 is 7960255261.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 847333881 + 778186816 = 29109^2 + 27896^2 .

It is a cyclic number.

It is not a de Polignac number, because 1625520697 - 2¹¹ = 1625518649 is a prime.

It is not a weakly prime, because it can be changed into another prime (1625520397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 812760348 + 812760349.

It is an arithmetic number, because the mean of its divisors is an integer number (812760349).

Almost surely, 2^1625520697 is an apocalyptic number.

It is an amenable number.

1625520697 is a deficient number, since it is larger than the sum of its proper divisors (1).

1625520697 is an equidigital number, since it uses as much as digits as its factorization.

1625520697 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 226800, while the sum is 43.

The square root of 1625520697 is about 40317.7466756266. The cubic root of 1625520697 is about 1175.7929030574.

The spelling of 1625520697 in words is "one billion, six hundred twenty-five million, five hundred twenty thousand, six hundred ninety-seven".