61922139 has 4 divisors (see below), whose sum is σ = 82562856. Its totient is φ = 41281424.

The previous prime is 61922123. The next prime is 61922149. The reversal of 61922139 is 93122916.

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 61922139 - 2⁴ = 61922123 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61922149) 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, 10320354 + ... + 10320359.

It is an arithmetic number, because the mean of its divisors is an integer number (20640714).

Almost surely, 2^61922139 is an apocalyptic number.

61922139 is a deficient number, since it is larger than the sum of its proper divisors (20640717).

61922139 is a wasteful number, since it uses less digits than its factorization.

61922139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20640716.

The product of its digits is 5832, while the sum is 33.

The square root of 61922139 is about 7869.0621423395. The cubic root of 61922139 is about 395.6234112427.

The spelling of 61922139 in words is "sixty-one million, nine hundred twenty-two thousand, one hundred thirty-nine".