617428431 has 12 divisors (see below), whose sum is σ = 893833200. Its totient is φ = 410699520.

The previous prime is 617428421. The next prime is 617428433. The reversal of 617428431 is 134824716.

617428431 is a `hidden beast` number, since 617 + 4 + 2 + 8 + 4 + 31 = 666.

It is not a de Polignac number, because 617428431 - 2¹³ = 617420239 is a prime.

It is a super-2 number, since 2×617428431² = 762435734814243522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (617428433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 72355 + ... + 80436.

It is an arithmetic number, because the mean of its divisors is an integer number (74486100).

Almost surely, 2^617428431 is an apocalyptic number.

617428431 is a deficient number, since it is larger than the sum of its proper divisors (276404769).

617428431 is a wasteful number, since it uses less digits than its factorization.

617428431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153246 (or 153243 counting only the distinct ones).

The product of its digits is 32256, while the sum is 36.

The square root of 617428431 is about 24848.1071914945. The cubic root of 617428431 is about 851.5213497076.

The spelling of 617428431 in words is "six hundred seventeen million, four hundred twenty-eight thousand, four hundred thirty-one".