401396493 has 4 divisors (see below), whose sum is σ = 535195328. Its totient is φ = 267597660.

The previous prime is 401396491. The next prime is 401396509. The reversal of 401396493 is 394693104.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 401396493 - 2¹ = 401396491 is a prime.

It is a super-2 number, since 2×401396493² = 322238289185398098, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401396491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66899413 + ... + 66899418.

It is an arithmetic number, because the mean of its divisors is an integer number (133798832).

Almost surely, 2^401396493 is an apocalyptic number.

It is an amenable number.

401396493 is a deficient number, since it is larger than the sum of its proper divisors (133798835).

401396493 is a wasteful number, since it uses less digits than its factorization.

401396493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133798834.

The product of its (nonzero) digits is 69984, while the sum is 39.

The square root of 401396493 is about 20034.8819063153. The cubic root of 401396493 is about 737.6627578351.

The spelling of 401396493 in words is "four hundred one million, three hundred ninety-six thousand, four hundred ninety-three".