53977421 has 2 divisors, whose sum is σ = 53977422. Its totient is φ = 53977420.

The previous prime is 53977403. The next prime is 53977447. The reversal of 53977421 is 12477935.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43414921 + 10562500 = 6589^2 + 3250^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53977421 is a prime.

It is a super-2 number, since 2×53977421² = 5827123955622482, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53977321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26988710 + 26988711.

It is an arithmetic number, because the mean of its divisors is an integer number (26988711).

Almost surely, 2^53977421 is an apocalyptic number.

It is an amenable number.

53977421 is a deficient number, since it is larger than the sum of its proper divisors (1).

53977421 is an equidigital number, since it uses as much as digits as its factorization.

53977421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 52920, while the sum is 38.

The square root of 53977421 is about 7346.9327613638. The cubic root of 53977421 is about 377.9236265921.

The spelling of 53977421 in words is "fifty-three million, nine hundred seventy-seven thousand, four hundred twenty-one".