401996709 has 16 divisors (see below), whose sum is σ = 600825600. Its totient is φ = 265624128.

The previous prime is 401996701. The next prime is 401996711. The reversal of 401996709 is 907699104.

It is not a de Polignac number, because 401996709 - 2³ = 401996701 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401996701) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62829 + ... + 68930.

It is an arithmetic number, because the mean of its divisors is an integer number (37551600).

Almost surely, 2^401996709 is an apocalyptic number.

It is an amenable number.

401996709 is a deficient number, since it is larger than the sum of its proper divisors (198828891).

401996709 is a wasteful number, since it uses less digits than its factorization.

401996709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131881 (or 131875 counting only the distinct ones).

The product of its (nonzero) digits is 122472, while the sum is 45.

The square root of 401996709 is about 20049.8555855148. The cubic root of 401996709 is about 738.0302552207.

The spelling of 401996709 in words is "four hundred one million, nine hundred ninety-six thousand, seven hundred nine".