61594921 has 2 divisors, whose sum is σ = 61594922. Its totient is φ = 61594920.

The previous prime is 61594913. The next prime is 61594987. The reversal of 61594921 is 12949516.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51322896 + 10272025 = 7164^2 + 3205^2 .

It is a cyclic number.

It is not a de Polignac number, because 61594921 - 2³ = 61594913 is a prime.

It is not a weakly prime, because it can be changed into another prime (61594021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30797460 + 30797461.

It is an arithmetic number, because the mean of its divisors is an integer number (30797461).

Almost surely, 2^61594921 is an apocalyptic number.

It is an amenable number.

61594921 is a deficient number, since it is larger than the sum of its proper divisors (1).

61594921 is an equidigital number, since it uses as much as digits as its factorization.

61594921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19440, while the sum is 37.

The square root of 61594921 is about 7848.2431792090. The cubic root of 61594921 is about 394.9253098109.

The spelling of 61594921 in words is "sixty-one million, five hundred ninety-four thousand, nine hundred twenty-one".