53401891 has 2 divisors, whose sum is σ = 53401892. Its totient is φ = 53401890.

The previous prime is 53401861. The next prime is 53401919. The reversal of 53401891 is 19810435.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 53401891 - 2¹³ = 53393699 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (53401861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26700945 + 26700946.

It is an arithmetic number, because the mean of its divisors is an integer number (26700946).

Almost surely, 2^53401891 is an apocalyptic number.

53401891 is a deficient number, since it is larger than the sum of its proper divisors (1).

53401891 is an equidigital number, since it uses as much as digits as its factorization.

53401891 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 53401891 is about 7307.6597485105. The cubic root of 53401891 is about 376.5756305781.

The spelling of 53401891 in words is "fifty-three million, four hundred one thousand, eight hundred ninety-one".