538464391 has 2 divisors, whose sum is σ = 538464392. Its totient is φ = 538464390.

The previous prime is 538464347. The next prime is 538464397. The reversal of 538464391 is 193464835.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 538464391 - 2¹³ = 538456199 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (538464397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 269232195 + 269232196.

It is an arithmetic number, because the mean of its divisors is an integer number (269232196).

Almost surely, 2^538464391 is an apocalyptic number.

538464391 is a deficient number, since it is larger than the sum of its proper divisors (1).

538464391 is an equidigital number, since it uses as much as digits as its factorization.

538464391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 311040, while the sum is 43.

The square root of 538464391 is about 23204.8355090054. The cubic root of 538464391 is about 813.5526476598.

The spelling of 538464391 in words is "five hundred thirty-eight million, four hundred sixty-four thousand, three hundred ninety-one".