625028861 has 4 divisors (see below), whose sum is σ = 626127900. Its totient is φ = 623929824.

The previous prime is 625028819. The next prime is 625028893. The reversal of 625028861 is 168820526.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 356265625 + 268763236 = 18875^2 + 16394^2 .

It is a cyclic number.

It is not a de Polignac number, because 625028861 - 2⁶ = 625028797 is a prime.

It is a super-2 number, since 2×625028861² = 781322154165914642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (625028801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 548666 + ... + 549803.

It is an arithmetic number, because the mean of its divisors is an integer number (156531975).

Almost surely, 2^625028861 is an apocalyptic number.

It is an amenable number.

625028861 is a deficient number, since it is larger than the sum of its proper divisors (1099039).

625028861 is a wasteful number, since it uses less digits than its factorization.

625028861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1099038.

The product of its (nonzero) digits is 46080, while the sum is 38.

The square root of 625028861 is about 25000.5772133365. The cubic root of 625028861 is about 855.0011335667.

The spelling of 625028861 in words is "six hundred twenty-five million, twenty-eight thousand, eight hundred sixty-one".