53457661 has 2 divisors, whose sum is σ = 53457662. Its totient is φ = 53457660.

The previous prime is 53457647. The next prime is 53457667. The reversal of 53457661 is 16675435.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28955161 + 24502500 = 5381^2 + 4950^2 .

It is a cyclic number.

It is not a de Polignac number, because 53457661 - 2⁵ = 53457629 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 53457661.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53457667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26728830 + 26728831.

It is an arithmetic number, because the mean of its divisors is an integer number (26728831).

Almost surely, 2^53457661 is an apocalyptic number.

It is an amenable number.

53457661 is a deficient number, since it is larger than the sum of its proper divisors (1).

53457661 is an equidigital number, since it uses as much as digits as its factorization.

53457661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 75600, while the sum is 37.

The square root of 53457661 is about 7311.4746118687. The cubic root of 53457661 is about 376.7066766003.

The spelling of 53457661 in words is "fifty-three million, four hundred fifty-seven thousand, six hundred sixty-one".