400376863673 has 2 divisors, whose sum is σ = 400376863674. Its totient is φ = 400376863672.

The previous prime is 400376863613. The next prime is 400376863681. The reversal of 400376863673 is 376368673004.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 371695070224 + 28681793449 = 609668^2 + 169357^2 .

It is a cyclic number.

It is not a de Polignac number, because 400376863673 - 2²⁶ = 400309754809 is a prime.

It is not a weakly prime, because it can be changed into another prime (400376863603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200188431836 + 200188431837.

It is an arithmetic number, because the mean of its divisors is an integer number (200188431837).

Almost surely, 2^400376863673 is an apocalyptic number.

It is an amenable number.

400376863673 is a deficient number, since it is larger than the sum of its proper divisors (1).

400376863673 is an equidigital number, since it uses as much as digits as its factorization.

400376863673 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9144576, while the sum is 53.

The spelling of 400376863673 in words is "four hundred billion, three hundred seventy-six million, eight hundred sixty-three thousand, six hundred seventy-three".