61790239 has 8 divisors (see below), whose sum is σ = 72340128. Its totient is φ = 51671040.

The previous prime is 61790233. The next prime is 61790243. The reversal of 61790239 is 93209716.

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

It is a cyclic number.

It is not a de Polignac number, because 61790239 - 2⁵ = 61790207 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61790198 and 61790207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61790233) 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, 107362 + ... + 107935.

It is an arithmetic number, because the mean of its divisors is an integer number (9042516).

Almost surely, 2^61790239 is an apocalyptic number.

61790239 is a deficient number, since it is larger than the sum of its proper divisors (10549889).

61790239 is a wasteful number, since it uses less digits than its factorization.

61790239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215345.

The product of its (nonzero) digits is 20412, while the sum is 37.

The square root of 61790239 is about 7860.6767520360. The cubic root of 61790239 is about 395.3423064872.

The spelling of 61790239 in words is "sixty-one million, seven hundred ninety thousand, two hundred thirty-nine".