53440859 has 2 divisors, whose sum is σ = 53440860. Its totient is φ = 53440858.

The previous prime is 53440789. The next prime is 53440879. The reversal of 53440859 is 95804435.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53440859 is a prime.

It is a Chen prime.

It is equal to p_3194849 and since 53440859 and 3194849 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (53440879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26720429 + 26720430.

It is an arithmetic number, because the mean of its divisors is an integer number (26720430).

Almost surely, 2^53440859 is an apocalyptic number.

53440859 is a deficient number, since it is larger than the sum of its proper divisors (1).

53440859 is an equidigital number, since it uses as much as digits as its factorization.

53440859 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 86400, while the sum is 38.

The square root of 53440859 is about 7310.3255057487. The cubic root of 53440859 is about 376.6672055578.

The spelling of 53440859 in words is "fifty-three million, four hundred forty thousand, eight hundred fifty-nine".