53326991 has 2 divisors, whose sum is σ = 53326992. Its totient is φ = 53326990.

The previous prime is 53326967. The next prime is 53327003. The reversal of 53326991 is 19962335.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 53326991 - 2⁶ = 53326927 is a prime.

It is a super-2 number, since 2×53326991² = 5687535938228162, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53326961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26663495 + 26663496.

It is an arithmetic number, because the mean of its divisors is an integer number (26663496).

Almost surely, 2^53326991 is an apocalyptic number.

53326991 is a deficient number, since it is larger than the sum of its proper divisors (1).

53326991 is an equidigital number, since it uses as much as digits as its factorization.

53326991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 43740, while the sum is 38.

The square root of 53326991 is about 7302.5331906127. The cubic root of 53326991 is about 376.3994900505.

The spelling of 53326991 in words is "fifty-three million, three hundred twenty-six thousand, nine hundred ninety-one".