400366699 has 2 divisors, whose sum is σ = 400366700. Its totient is φ = 400366698.

The previous prime is 400366697. The next prime is 400366709. The reversal of 400366699 is 996663004.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 400366699 - 2¹ = 400366697 is a prime.

Together with 400366697, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (400366693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200183349 + 200183350.

It is an arithmetic number, because the mean of its divisors is an integer number (200183350).

Almost surely, 2^400366699 is an apocalyptic number.

400366699 is a deficient number, since it is larger than the sum of its proper divisors (1).

400366699 is an equidigital number, since it uses as much as digits as its factorization.

400366699 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 209952, while the sum is 43.

The square root of 400366699 is about 20009.1653748976. The cubic root of 400366699 is about 737.0313860707.

The spelling of 400366699 in words is "four hundred million, three hundred sixty-six thousand, six hundred ninety-nine".