61239493 has 4 divisors (see below), whose sum is σ = 69988000. Its totient is φ = 52490988.

The previous prime is 61239469. The next prime is 61239511. The reversal of 61239493 is 39493216.

61239493 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 a cyclic number.

It is not a de Polignac number, because 61239493 - 2⁵ = 61239461 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 (61239443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4374243 + ... + 4374256.

It is an arithmetic number, because the mean of its divisors is an integer number (17497000).

Almost surely, 2^61239493 is an apocalyptic number.

It is an amenable number.

61239493 is a deficient number, since it is larger than the sum of its proper divisors (8748507).

61239493 is an equidigital number, since it uses as much as digits as its factorization.

61239493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8748506.

The product of its digits is 34992, while the sum is 37.

The square root of 61239493 is about 7825.5666248522. The cubic root of 61239493 is about 394.1642168920.

The spelling of 61239493 in words is "sixty-one million, two hundred thirty-nine thousand, four hundred ninety-three".