401992499 has 2 divisors, whose sum is σ = 401992500. Its totient is φ = 401992498.

The previous prime is 401992483. The next prime is 401992529. The reversal of 401992499 is 994299104.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 401992499 - 2⁴ = 401992483 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (401992399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200996249 + 200996250.

It is an arithmetic number, because the mean of its divisors is an integer number (200996250).

Almost surely, 2^401992499 is an apocalyptic number.

401992499 is a deficient number, since it is larger than the sum of its proper divisors (1).

401992499 is an equidigital number, since it uses as much as digits as its factorization.

401992499 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 47.

The square root of 401992499 is about 20049.7505969526. The cubic root of 401992499 is about 738.0276788164.

The spelling of 401992499 in words is "four hundred one million, nine hundred ninety-two thousand, four hundred ninety-nine".