401281399 has 2 divisors, whose sum is σ = 401281400. Its totient is φ = 401281398.

The previous prime is 401281339. The next prime is 401281403. The reversal of 401281399 is 993182104.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 401281399 - 2⁷ = 401281271 is a prime.

It is a super-2 number, since 2×401281399² = 322053522366794402, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (401281319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200640699 + 200640700.

It is an arithmetic number, because the mean of its divisors is an integer number (200640700).

Almost surely, 2^401281399 is an apocalyptic number.

401281399 is a deficient number, since it is larger than the sum of its proper divisors (1).

401281399 is an equidigital number, since it uses as much as digits as its factorization.

401281399 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 401281399 is about 20032.0093600218. The cubic root of 401281399 is about 737.5922467778.

The spelling of 401281399 in words is "four hundred one million, two hundred eighty-one thousand, three hundred ninety-nine".