401015999 has 2 divisors, whose sum is σ = 401016000. Its totient is φ = 401015998.

The previous prime is 401015959. The next prime is 401016001. The reversal of 401015999 is 999510104.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 401015999 - 2¹² = 401011903 is a prime.

Together with 401016001, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (401015959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200507999 + 200508000.

It is an arithmetic number, because the mean of its divisors is an integer number (200508000).

Almost surely, 2^401015999 is an apocalyptic number.

401015999 is a deficient number, since it is larger than the sum of its proper divisors (1).

401015999 is an equidigital number, since it uses as much as digits as its factorization.

401015999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14580, while the sum is 38.

The square root of 401015999 is about 20025.3838664831. The cubic root of 401015999 is about 737.4296010174.

The spelling of 401015999 in words is "four hundred one million, fifteen thousand, nine hundred ninety-nine".