61603431 has 8 divisors (see below), whose sum is σ = 82905984. Its totient is φ = 40684920.

The previous prime is 61603429. The next prime is 61603433. The reversal of 61603431 is 13430616.

It is an interprime number because it is at equal distance from previous prime (61603429) and next prime (61603433).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 61603431 - 2¹ = 61603429 is a prime.

It is a super-2 number, since 2×61603431² = 7589965421943522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61603433) 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 7 ways as a sum of consecutive naturals, for example, 95635 + ... + 96276.

It is an arithmetic number, because the mean of its divisors is an integer number (10363248).

Almost surely, 2^61603431 is an apocalyptic number.

61603431 is a deficient number, since it is larger than the sum of its proper divisors (21302553).

61603431 is a wasteful number, since it uses less digits than its factorization.

61603431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192021.

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 61603431 is about 7848.7853200352. The cubic root of 61603431 is about 394.9434966980.

It can be divided in two parts, 6160 and 3431, that added together give a triangular number (9591 = T₁₃₈).

The spelling of 61603431 in words is "sixty-one million, six hundred three thousand, four hundred thirty-one".