401305279 has 2 divisors, whose sum is σ = 401305280. Its totient is φ = 401305278.

The previous prime is 401305217. The next prime is 401305297. The reversal of 401305279 is 972503104.

Together with next prime (401305297) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 401305279 - 2²⁵ = 367750847 is a prime.

It is a super-2 number, since 2×401305279² = 322091853906535682, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 401305279.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (401305379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200652639 + 200652640.

It is an arithmetic number, because the mean of its divisors is an integer number (200652640).

Almost surely, 2^401305279 is an apocalyptic number.

401305279 is a deficient number, since it is larger than the sum of its proper divisors (1).

401305279 is an equidigital number, since it uses as much as digits as its factorization.

401305279 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 401305279 is about 20032.6053972018. The cubic root of 401305279 is about 737.6068777023.

The spelling of 401305279 in words is "four hundred one million, three hundred five thousand, two hundred seventy-nine".