61323491 has 8 divisors (see below), whose sum is σ = 62596800. Its totient is φ = 60054592.

The previous prime is 61323443. The next prime is 61323499. The reversal of 61323491 is 19432316.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61323491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61323499) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55046 + ... + 56148.

It is an arithmetic number, because the mean of its divisors is an integer number (7824600).

Almost surely, 2^61323491 is an apocalyptic number.

61323491 is a deficient number, since it is larger than the sum of its proper divisors (1273309).

61323491 is a wasteful number, since it uses less digits than its factorization.

61323491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2205.

The product of its digits is 3888, while the sum is 29.

The square root of 61323491 is about 7830.9316814795. The cubic root of 61323491 is about 394.3443505390.

The spelling of 61323491 in words is "sixty-one million, three hundred twenty-three thousand, four hundred ninety-one".