625612091 has 4 divisors (see below), whose sum is σ = 673736112. Its totient is φ = 577488072.

The previous prime is 625612067. The next prime is 625612103. The reversal of 625612091 is 190216526.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-625612091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (625612991) 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, 24061991 + ... + 24062016.

It is an arithmetic number, because the mean of its divisors is an integer number (168434028).

Almost surely, 2^625612091 is an apocalyptic number.

625612091 is a deficient number, since it is larger than the sum of its proper divisors (48124021).

625612091 is a wasteful number, since it uses less digits than its factorization.

625612091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48124020.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 625612091 is about 25012.2388242236. The cubic root of 625612091 is about 855.2669918429.

The spelling of 625612091 in words is "six hundred twenty-five million, six hundred twelve thousand, ninety-one".