617921934 has 16 divisors (see below), whose sum is σ = 1412393088. Its totient is φ = 176549112.

The previous prime is 617921917. The next prime is 617921957. The reversal of 617921934 is 439129716.

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 14712427 = 617921934 / (6 + 1 + 7 + 9 + 2 + 1 + 9 + 3 + 4).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7356172 + ... + 7356255.

It is an arithmetic number, because the mean of its divisors is an integer number (88274568).

Almost surely, 2^617921934 is an apocalyptic number.

617921934 is an abundant number, since it is smaller than the sum of its proper divisors (794471154).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

617921934 is a wasteful number, since it uses less digits than its factorization.

617921934 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14712439.

The product of its digits is 81648, while the sum is 42.

The square root of 617921934 is about 24858.0356021951. The cubic root of 617921934 is about 851.7481594927.

The spelling of 617921934 in words is "six hundred seventeen million, nine hundred twenty-one thousand, nine hundred thirty-four".