625932091 has 4 divisors (see below), whose sum is σ = 628068672. Its totient is φ = 623795512.

The previous prime is 625932077. The next prime is 625932101. The reversal of 625932091 is 190239526.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 190239526 = 2 ⋅95119763.

It is a cyclic number.

It is not a de Polignac number, because 625932091 - 2⁵ = 625932059 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 625932091.

It is not an unprimeable number, because it can be changed into a prime (625932001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1067851 + ... + 1068436.

It is an arithmetic number, because the mean of its divisors is an integer number (157017168).

Almost surely, 2^625932091 is an apocalyptic number.

625932091 is a deficient number, since it is larger than the sum of its proper divisors (2136581).

625932091 is a wasteful number, since it uses less digits than its factorization.

625932091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2136580.

The product of its (nonzero) digits is 29160, while the sum is 37.

The square root of 625932091 is about 25018.6348748288. The cubic root of 625932091 is about 855.4127897430.

The spelling of 625932091 in words is "six hundred twenty-five million, nine hundred thirty-two thousand, ninety-one".