400352677 has 2 divisors, whose sum is σ = 400352678. Its totient is φ = 400352676.

The previous prime is 400352663. The next prime is 400352681. The reversal of 400352677 is 776253004.

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., 393665281 + 6687396 = 19841^2 + 2586^2 .

It is a cyclic number.

It is not a de Polignac number, because 400352677 - 2⁷ = 400352549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400352647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200176338 + 200176339.

It is an arithmetic number, because the mean of its divisors is an integer number (200176339).

Almost surely, 2^400352677 is an apocalyptic number.

It is an amenable number.

400352677 is a deficient number, since it is larger than the sum of its proper divisors (1).

400352677 is an equidigital number, since it uses as much as digits as its factorization.

400352677 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 35280, while the sum is 34.

The square root of 400352677 is about 20008.8149824021. The cubic root of 400352677 is about 737.0227816465.

The spelling of 400352677 in words is "four hundred million, three hundred fifty-two thousand, six hundred seventy-seven".