61694231 has 4 divisors (see below), whose sum is σ = 62330352. Its totient is φ = 61058112.

The previous prime is 61694201. The next prime is 61694261. The reversal of 61694231 is 13249616.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (61694201) and next prime (61694261).

It is a cyclic number.

It is not a de Polignac number, because 61694231 - 2²² = 57499927 is a prime.

It is a super-2 number, since 2×61694231² = 7612356277362722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61694201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 317915 + ... + 318108.

It is an arithmetic number, because the mean of its divisors is an integer number (15582588).

Almost surely, 2^61694231 is an apocalyptic number.

61694231 is a deficient number, since it is larger than the sum of its proper divisors (636121).

61694231 is an equidigital number, since it uses as much as digits as its factorization.

61694231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 636120.

The product of its digits is 7776, while the sum is 32.

The square root of 61694231 is about 7854.5675246954. The cubic root of 61694231 is about 395.1374429570.

The spelling of 61694231 in words is "sixty-one million, six hundred ninety-four thousand, two hundred thirty-one".