400940097 has 8 divisors (see below), whose sum is σ = 535073280. Its totient is φ = 267050160.

The previous prime is 400940093. The next prime is 400940123. The reversal of 400940097 is 790049004.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 400940097 - 2² = 400940093 is a prime.

It is a super-3 number, since 3×400940097³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (400940093) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56929 + ... + 63582.

It is an arithmetic number, because the mean of its divisors is an integer number (66884160).

Almost surely, 2^400940097 is an apocalyptic number.

It is an amenable number.

400940097 is a deficient number, since it is larger than the sum of its proper divisors (134133183).

400940097 is a wasteful number, since it uses less digits than its factorization.

400940097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121623.

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 400940097 is about 20023.4886321040. The cubic root of 400940097 is about 737.3830726050.

The spelling of 400940097 in words is "four hundred million, nine hundred forty thousand, ninety-seven".