61753921 has 2 divisors, whose sum is σ = 61753922. Its totient is φ = 61753920.

The previous prime is 61753897. The next prime is 61753927. The reversal of 61753921 is 12935716.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52359696 + 9394225 = 7236^2 + 3065^2 .

It is a cyclic number.

It is not a de Polignac number, because 61753921 - 2⁵ = 61753889 is a prime.

It is not a weakly prime, because it can be changed into another prime (61753927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30876960 + 30876961.

It is an arithmetic number, because the mean of its divisors is an integer number (30876961).

Almost surely, 2^61753921 is an apocalyptic number.

It is an amenable number.

61753921 is a deficient number, since it is larger than the sum of its proper divisors (1).

61753921 is an equidigital number, since it uses as much as digits as its factorization.

61753921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11340, while the sum is 34.

The square root of 61753921 is about 7858.3663060461. The cubic root of 61753921 is about 395.2648354817.

The spelling of 61753921 in words is "sixty-one million, seven hundred fifty-three thousand, nine hundred twenty-one".