61913137 has 8 divisors (see below), whose sum is σ = 72737280. Its totient is φ = 51954960.

The previous prime is 61913129. The next prime is 61913149. The reversal of 61913137 is 73131916.

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 61913137 - 2³ = 61913129 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61913099 and 61913108.

It is not an unprimeable number, because it can be changed into a prime (61943137) 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, 216337 + ... + 216622.

It is an arithmetic number, because the mean of its divisors is an integer number (9092160).

Almost surely, 2^61913137 is an apocalyptic number.

It is an amenable number.

61913137 is a deficient number, since it is larger than the sum of its proper divisors (10824143).

61913137 is a wasteful number, since it uses less digits than its factorization.

61913137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432983.

The product of its digits is 3402, while the sum is 31.

The square root of 61913137 is about 7868.4901347082. The cubic root of 61913137 is about 395.6042389155.

The spelling of 61913137 in words is "sixty-one million, nine hundred thirteen thousand, one hundred thirty-seven".