400120130409 has 4 divisors (see below), whose sum is σ = 533493507216. Its totient is φ = 266746753604.

The previous prime is 400120130387. The next prime is 400120130477. The reversal of 400120130409 is 904031021004.

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 a cyclic number.

It is not a de Polignac number, because 400120130409 - 2⁹ = 400120129897 is a prime.

It is a super-2 number, since 2×400120130409² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (400120130479) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66686688399 + ... + 66686688404.

It is an arithmetic number, because the mean of its divisors is an integer number (133373376804).

Almost surely, 2^400120130409 is an apocalyptic number.

It is an amenable number.

400120130409 is a deficient number, since it is larger than the sum of its proper divisors (133373376807).

400120130409 is a wasteful number, since it uses less digits than its factorization.

400120130409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133373376806.

The product of its (nonzero) digits is 864, while the sum is 24.

The spelling of 400120130409 in words is "four hundred billion, one hundred twenty million, one hundred thirty thousand, four hundred nine".