61323997 has 4 divisors (see below), whose sum is σ = 70084576. Its totient is φ = 52563420.

The previous prime is 61323991. The next prime is 61324027. The reversal of 61323997 is 79932316.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 61323997 - 2³ = 61323989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61323991) 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, 4380279 + ... + 4380292.

It is an arithmetic number, because the mean of its divisors is an integer number (17521144).

Almost surely, 2^61323997 is an apocalyptic number.

It is an amenable number.

61323997 is a deficient number, since it is larger than the sum of its proper divisors (8760579).

61323997 is an equidigital number, since it uses as much as digits as its factorization.

61323997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8760578.

The product of its digits is 61236, while the sum is 40.

The square root of 61323997 is about 7830.9639891906. The cubic root of 61323997 is about 394.3454351570.

The spelling of 61323997 in words is "sixty-one million, three hundred twenty-three thousand, nine hundred ninety-seven".