61064431 has 2 divisors, whose sum is σ = 61064432. Its totient is φ = 61064430.

The previous prime is 61064417. The next prime is 61064447. The reversal of 61064431 is 13446016.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61064431 - 2¹⁷ = 60933359 is a prime.

It is a super-2 number, since 2×61064431² = 7457729466707522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 61064396 and 61064405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61064231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30532215 + 30532216.

It is an arithmetic number, because the mean of its divisors is an integer number (30532216).

Almost surely, 2^61064431 is an apocalyptic number.

61064431 is a deficient number, since it is larger than the sum of its proper divisors (1).

61064431 is an equidigital number, since it uses as much as digits as its factorization.

61064431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 61064431 is about 7814.3733593936. The cubic root of 61064431 is about 393.7882665086.

The spelling of 61064431 in words is "sixty-one million, sixty-four thousand, four hundred thirty-one".