1625232391 has 2 divisors, whose sum is σ = 1625232392. Its totient is φ = 1625232390.

The previous prime is 1625232383. The next prime is 1625232397. The reversal of 1625232391 is 1932325261.

It is a strong prime.

It is an emirp because it is prime and its reverse (1932325261) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1625232391 - 2³ = 1625232383 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1625232397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 812616195 + 812616196.

It is an arithmetic number, because the mean of its divisors is an integer number (812616196).

Almost surely, 2^1625232391 is an apocalyptic number.

1625232391 is a deficient number, since it is larger than the sum of its proper divisors (1).

1625232391 is an equidigital number, since it uses as much as digits as its factorization.

1625232391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19440, while the sum is 34.

The square root of 1625232391 is about 40314.1710940458. The cubic root of 1625232391 is about 1175.7233851910.

The spelling of 1625232391 in words is "one billion, six hundred twenty-five million, two hundred thirty-two thousand, three hundred ninety-one".