400570487 has 2 divisors, whose sum is σ = 400570488. Its totient is φ = 400570486.

The previous prime is 400570459. The next prime is 400570493. The reversal of 400570487 is 784075004.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 400570487 - 2¹⁸ = 400308343 is a 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 (400573487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200285243 + 200285244.

It is an arithmetic number, because the mean of its divisors is an integer number (200285244).

Almost surely, 2^400570487 is an apocalyptic number.

400570487 is a deficient number, since it is larger than the sum of its proper divisors (1).

400570487 is an equidigital number, since it uses as much as digits as its factorization.

400570487 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31360, while the sum is 35.

The square root of 400570487 is about 20014.2570933822. The cubic root of 400570487 is about 737.1564153467.

The spelling of 400570487 in words is "four hundred million, five hundred seventy thousand, four hundred eighty-seven".