53449897 has 2 divisors, whose sum is σ = 53449898. Its totient is φ = 53449896.

The previous prime is 53449889. The next prime is 53449901. The reversal of 53449897 is 79894435.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27836176 + 25613721 = 5276^2 + 5061^2 .

It is a cyclic number.

It is not a de Polignac number, because 53449897 - 2³ = 53449889 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 53449897.

It is not a weakly prime, because it can be changed into another prime (53449397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26724948 + 26724949.

It is an arithmetic number, because the mean of its divisors is an integer number (26724949).

Almost surely, 2^53449897 is an apocalyptic number.

It is an amenable number.

53449897 is a deficient number, since it is larger than the sum of its proper divisors (1).

53449897 is an equidigital number, since it uses as much as digits as its factorization.

53449897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1088640, while the sum is 49.

The square root of 53449897 is about 7310.9436463428. The cubic root of 53449897 is about 376.6884385393.

The spelling of 53449897 in words is "fifty-three million, four hundred forty-nine thousand, eight hundred ninety-seven".