61296431 has 4 divisors (see below), whose sum is σ = 70053072. Its totient is φ = 52539792.

The previous prime is 61296427. The next prime is 61296439. The reversal of 61296431 is 13469216.

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

It is a cyclic number.

It is not a de Polignac number, because 61296431 - 2² = 61296427 is a prime.

It is a super-2 number, since 2×61296431² = 7514504906675522, 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 (61296439) 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 3 ways as a sum of consecutive naturals, for example, 4378310 + ... + 4378323.

It is an arithmetic number, because the mean of its divisors is an integer number (17513268).

Almost surely, 2^61296431 is an apocalyptic number.

61296431 is a deficient number, since it is larger than the sum of its proper divisors (8756641).

61296431 is an equidigital number, since it uses as much as digits as its factorization.

61296431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8756640.

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

The square root of 61296431 is about 7829.2037270721. The cubic root of 61296431 is about 394.2863383596.

The spelling of 61296431 in words is "sixty-one million, two hundred ninety-six thousand, four hundred thirty-one".