400364539 has 2 divisors, whose sum is σ = 400364540. Its totient is φ = 400364538.

The previous prime is 400364509. The next prime is 400364557. The reversal of 400364539 is 935463004.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 400364539 - 2¹¹ = 400362491 is a prime.

It is not a weakly prime, because it can be changed into another prime (400364509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200182269 + 200182270.

It is an arithmetic number, because the mean of its divisors is an integer number (200182270).

Almost surely, 2^400364539 is an apocalyptic number.

400364539 is a deficient number, since it is larger than the sum of its proper divisors (1).

400364539 is an equidigital number, since it uses as much as digits as its factorization.

400364539 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38880, while the sum is 34.

The square root of 400364539 is about 20009.1113995600. Note that the first 3 decimals coincide. The cubic root of 400364539 is about 737.0300606269.

The spelling of 400364539 in words is "four hundred million, three hundred sixty-four thousand, five hundred thirty-nine".