400477793 has 2 divisors, whose sum is σ = 400477794. Its totient is φ = 400477792.

The previous prime is 400477787. The next prime is 400477807. The reversal of 400477793 is 397774004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 233111824 + 167365969 = 15268^2 + 12937^2 .

It is a cyclic number.

It is not a de Polignac number, because 400477793 - 2⁶ = 400477729 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 400477793.

It is not a weakly prime, because it can be changed into another prime (400477093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200238896 + 200238897.

It is an arithmetic number, because the mean of its divisors is an integer number (200238897).

Almost surely, 2^400477793 is an apocalyptic number.

It is an amenable number.

400477793 is a deficient number, since it is larger than the sum of its proper divisors (1).

400477793 is an equidigital number, since it uses as much as digits as its factorization.

400477793 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 148176, while the sum is 41.

The square root of 400477793 is about 20011.9412601576. The cubic root of 400477793 is about 737.0995504084.

The spelling of 400477793 in words is "four hundred million, four hundred seventy-seven thousand, seven hundred ninety-three".