625121279 has 2 divisors, whose sum is σ = 625121280. Its totient is φ = 625121278.

The previous prime is 625121269. The next prime is 625121309. The reversal of 625121279 is 972121526.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 625121279 - 2⁸ = 625121023 is a prime.

It is a super-2 number, since 2×625121279² = 781553226917191682, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (625121239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 312560639 + 312560640.

It is an arithmetic number, because the mean of its divisors is an integer number (312560640).

Almost surely, 2^625121279 is an apocalyptic number.

625121279 is a deficient number, since it is larger than the sum of its proper divisors (1).

625121279 is an equidigital number, since it uses as much as digits as its factorization.

625121279 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15120, while the sum is 35.

The square root of 625121279 is about 25002.4254623426. The cubic root of 625121279 is about 855.0432722077.

The spelling of 625121279 in words is "six hundred twenty-five million, one hundred twenty-one thousand, two hundred seventy-nine".