61376921 has 4 divisors (see below), whose sum is σ = 61419792. Its totient is φ = 61334052.

The previous prime is 61376911. The next prime is 61376929. The reversal of 61376921 is 12967316.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 61376921 - 2²² = 57182617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61376929) 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, 19211 + ... + 22176.

It is an arithmetic number, because the mean of its divisors is an integer number (15354948).

Almost surely, 2^61376921 is an apocalyptic number.

It is an amenable number.

61376921 is a deficient number, since it is larger than the sum of its proper divisors (42871).

61376921 is a wasteful number, since it uses less digits than its factorization.

61376921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42870.

The product of its digits is 13608, while the sum is 35.

The square root of 61376921 is about 7834.3424101835. The cubic root of 61376921 is about 394.4588455556.

The spelling of 61376921 in words is "sixty-one million, three hundred seventy-six thousand, nine hundred twenty-one".