53977321 has 2 divisors, whose sum is σ = 53977322. Its totient is φ = 53977320.

The previous prime is 53977247. The next prime is 53977337. The reversal of 53977321 is 12377935.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47403225 + 6574096 = 6885^2 + 2564^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53977321 is a prime.

It is not a weakly prime, because it can be changed into another prime (53977351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26988660 + 26988661.

It is an arithmetic number, because the mean of its divisors is an integer number (26988661).

Almost surely, 2^53977321 is an apocalyptic number.

It is an amenable number.

53977321 is a deficient number, since it is larger than the sum of its proper divisors (1).

53977321 is an equidigital number, since it uses as much as digits as its factorization.

53977321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 39690, while the sum is 37.

The square root of 53977321 is about 7346.9259557995. The cubic root of 53977321 is about 377.9233932081.

The spelling of 53977321 in words is "fifty-three million, nine hundred seventy-seven thousand, three hundred twenty-one".