53044991 has 2 divisors, whose sum is σ = 53044992. Its totient is φ = 53044990.

The previous prime is 53044987. The next prime is 53044993. The reversal of 53044991 is 19944035.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 53044991 - 2² = 53044987 is a prime.

It is a Sophie Germain prime.

Together with 53044993, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53044993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26522495 + 26522496.

It is an arithmetic number, because the mean of its divisors is an integer number (26522496).

Almost surely, 2^53044991 is an apocalyptic number.

53044991 is a deficient number, since it is larger than the sum of its proper divisors (1).

53044991 is an equidigital number, since it uses as much as digits as its factorization.

53044991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 53044991 is about 7283.1992283611. The cubic root of 53044991 is about 375.7348340728.

The spelling of 53044991 in words is "fifty-three million, forty-four thousand, nine hundred ninety-one".