61913929 has 8 divisors (see below), whose sum is σ = 77191488. Its totient is φ = 48244560.

The previous prime is 61913921. The next prime is 61913947. The reversal of 61913929 is 92931916.

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

It is not a de Polignac number, because 61913929 - 2³ = 61913921 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61913891 and 61913900.

It is not an unprimeable number, because it can be changed into a prime (61913921) 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, 401962 + ... + 402115.

It is an arithmetic number, because the mean of its divisors is an integer number (9648936).

Almost surely, 2^61913929 is an apocalyptic number.

It is an amenable number.

61913929 is a deficient number, since it is larger than the sum of its proper divisors (15277559).

61913929 is a wasteful number, since it uses less digits than its factorization.

61913929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 804095.

The product of its digits is 26244, while the sum is 40.

The square root of 61913929 is about 7868.5404618646. The cubic root of 61913929 is about 395.6059257800.

The spelling of 61913929 in words is "sixty-one million, nine hundred thirteen thousand, nine hundred twenty-nine".