400670771 has 2 divisors, whose sum is σ = 400670772. Its totient is φ = 400670770.

The previous prime is 400670729. The next prime is 400670801. The reversal of 400670771 is 177076004.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 400670771 - 2⁶ = 400670707 is a prime.

It is not a weakly prime, because it can be changed into another prime (400670701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200335385 + 200335386.

It is an arithmetic number, because the mean of its divisors is an integer number (200335386).

Almost surely, 2^400670771 is an apocalyptic number.

400670771 is a deficient number, since it is larger than the sum of its proper divisors (1).

400670771 is an equidigital number, since it uses as much as digits as its factorization.

400670771 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8232, while the sum is 32.

The square root of 400670771 is about 20016.7622506738. The cubic root of 400670771 is about 737.2179266396.

The spelling of 400670771 in words is "four hundred million, six hundred seventy thousand, seven hundred seventy-one".