400609633 has 2 divisors, whose sum is σ = 400609634. Its totient is φ = 400609632.

The previous prime is 400609613. The next prime is 400609637. The reversal of 400609633 is 336906004.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 317124864 + 83484769 = 17808^2 + 9137^2 .

It is a cyclic number.

It is not a de Polignac number, because 400609633 - 2²¹ = 398512481 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 400609595 and 400609604.

It is not a weakly prime, because it can be changed into another prime (400609637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200304816 + 200304817.

It is an arithmetic number, because the mean of its divisors is an integer number (200304817).

Almost surely, 2^400609633 is an apocalyptic number.

It is an amenable number.

400609633 is a deficient number, since it is larger than the sum of its proper divisors (1).

400609633 is an equidigital number, since it uses as much as digits as its factorization.

400609633 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 31.

The square root of 400609633 is about 20015.2350223523. The cubic root of 400609633 is about 737.1804275876.

The spelling of 400609633 in words is "four hundred million, six hundred nine thousand, six hundred thirty-three".