53766491 has 2 divisors, whose sum is σ = 53766492. Its totient is φ = 53766490.

The previous prime is 53766407. The next prime is 53766509. The reversal of 53766491 is 19466735.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53766491 is a prime.

It is not a weakly prime, because it can be changed into another prime (53766091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26883245 + 26883246.

It is an arithmetic number, because the mean of its divisors is an integer number (26883246).

Almost surely, 2^53766491 is an apocalyptic number.

53766491 is a deficient number, since it is larger than the sum of its proper divisors (1).

53766491 is an equidigital number, since it uses as much as digits as its factorization.

53766491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 136080, while the sum is 41.

The square root of 53766491 is about 7332.5637399207. The cubic root of 53766491 is about 377.4307075718.

The spelling of 53766491 in words is "fifty-three million, seven hundred sixty-six thousand, four hundred ninety-one".