400093613 has 2 divisors, whose sum is σ = 400093614. Its totient is φ = 400093612.

The previous prime is 400093609. The next prime is 400093633. The reversal of 400093613 is 316390004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 375313129 + 24780484 = 19373^2 + 4978^2 .

It is a cyclic number.

It is not a de Polignac number, because 400093613 - 2² = 400093609 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400093633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200046806 + 200046807.

It is an arithmetic number, because the mean of its divisors is an integer number (200046807).

Almost surely, 2^400093613 is an apocalyptic number.

It is an amenable number.

400093613 is a deficient number, since it is larger than the sum of its proper divisors (1).

400093613 is an equidigital number, since it uses as much as digits as its factorization.

400093613 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 26.

The square root of 400093613 is about 20002.3401880880. The cubic root of 400093613 is about 736.8637741181.

The spelling of 400093613 in words is "four hundred million, ninety-three thousand, six hundred thirteen".