61923813 has 16 divisors (see below), whose sum is σ = 94500480. Its totient is φ = 35332416.

The previous prime is 61923791. The next prime is 61923839. The reversal of 61923813 is 31832916.

It is not a de Polignac number, because 61923813 - 2⁵ = 61923781 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61923013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15631 + ... + 19187.

It is an arithmetic number, because the mean of its divisors is an integer number (5906280).

Almost surely, 2^61923813 is an apocalyptic number.

It is an amenable number.

61923813 is a deficient number, since it is larger than the sum of its proper divisors (32576667).

61923813 is a wasteful number, since it uses less digits than its factorization.

61923813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4396.

The product of its digits is 7776, while the sum is 33.

The square root of 61923813 is about 7869.1685075362. The cubic root of 61923813 is about 395.6269762984.

The spelling of 61923813 in words is "sixty-one million, nine hundred twenty-three thousand, eight hundred thirteen".