1625214917 has 2 divisors, whose sum is σ = 1625214918. Its totient is φ = 1625214916.

The previous prime is 1625214881. The next prime is 1625214919. The reversal of 1625214917 is 7194125261.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1533035716 + 92179201 = 39154^2 + 9601^2 .

It is a cyclic number.

It is not a de Polignac number, because 1625214917 - 2²² = 1621020613 is a prime.

Together with 1625214919, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1625214919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 812607458 + 812607459.

It is an arithmetic number, because the mean of its divisors is an integer number (812607459).

Almost surely, 2^1625214917 is an apocalyptic number.

It is an amenable number.

1625214917 is a deficient number, since it is larger than the sum of its proper divisors (1).

1625214917 is an equidigital number, since it uses as much as digits as its factorization.

1625214917 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30240, while the sum is 38.

The square root of 1625214917 is about 40313.9543706643. The cubic root of 1625214917 is about 1175.7191715035.

The spelling of 1625214917 in words is "one billion, six hundred twenty-five million, two hundred fourteen thousand, nine hundred seventeen".