400570493 has 2 divisors, whose sum is σ = 400570494. Its totient is φ = 400570492.

The previous prime is 400570487. The next prime is 400570517. The reversal of 400570493 is 394075004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 379977049 + 20593444 = 19493^2 + 4538^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-400570493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400570403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200285246 + 200285247.

It is an arithmetic number, because the mean of its divisors is an integer number (200285247).

Almost surely, 2^400570493 is an apocalyptic number.

It is an amenable number.

400570493 is a deficient number, since it is larger than the sum of its proper divisors (1).

400570493 is an equidigital number, since it uses as much as digits as its factorization.

400570493 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 400570493 is about 20014.2572432754. The cubic root of 400570493 is about 737.1564190272.

The spelling of 400570493 in words is "four hundred million, five hundred seventy thousand, four hundred ninety-three".