617420931 has 16 divisors (see below), whose sum is σ = 827447040. Its totient is φ = 409511520.

The previous prime is 617420873. The next prime is 617420953. The reversal of 617420931 is 139024716.

It is not a de Polignac number, because 617420931 - 2¹⁷ = 617289859 is a prime.

It is a super-3 number, since 3×617420931³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 617420892 and 617420901.

It is not an unprimeable number, because it can be changed into a prime (617420131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 933741 + ... + 934401.

It is an arithmetic number, because the mean of its divisors is an integer number (51715440).

Almost surely, 2^617420931 is an apocalyptic number.

617420931 is a deficient number, since it is larger than the sum of its proper divisors (210026109).

617420931 is a wasteful number, since it uses less digits than its factorization.

617420931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1786.

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 617420931 is about 24847.9562741083. The cubic root of 617420931 is about 851.5179018392.

The spelling of 617420931 in words is "six hundred seventeen million, four hundred twenty thousand, nine hundred thirty-one".