61759231 has 2 divisors, whose sum is σ = 61759232. Its totient is φ = 61759230.

The previous prime is 61759157. The next prime is 61759259. The reversal of 61759231 is 13295716.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61759231 is a prime.

It is a super-2 number, since 2×61759231² = 7628405227422722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61759261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30879615 + 30879616.

It is an arithmetic number, because the mean of its divisors is an integer number (30879616).

Almost surely, 2^61759231 is an apocalyptic number.

61759231 is a deficient number, since it is larger than the sum of its proper divisors (1).

61759231 is an equidigital number, since it uses as much as digits as its factorization.

61759231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11340, while the sum is 34.

The square root of 61759231 is about 7858.7041552663. The cubic root of 61759231 is about 395.2761642961.

The spelling of 61759231 in words is "sixty-one million, seven hundred fifty-nine thousand, two hundred thirty-one".