61921893 has 32 divisors (see below), whose sum is σ = 96422400. Its totient is φ = 34948800.

The previous prime is 61921879. The next prime is 61921913. The reversal of 61921893 is 39812916.

It is not a de Polignac number, because 61921893 - 2⁸ = 61921637 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61921493) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 37438 + ... + 39056.

It is an arithmetic number, because the mean of its divisors is an integer number (3013200).

Almost surely, 2^61921893 is an apocalyptic number.

It is an amenable number.

61921893 is a deficient number, since it is larger than the sum of its proper divisors (34500507).

61921893 is a wasteful number, since it uses less digits than its factorization.

61921893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1713.

The product of its digits is 23328, while the sum is 39.

The square root of 61921893 is about 7869.0465114904. The cubic root of 61921893 is about 395.6228873403.

The spelling of 61921893 in words is "sixty-one million, nine hundred twenty-one thousand, eight hundred ninety-three".