401973939 has 18 divisors (see below), whose sum is σ = 593275020. Its totient is φ = 262267896.

The previous prime is 401973919. The next prime is 401973947. The reversal of 401973939 is 939379104.

It is not a de Polignac number, because 401973939 - 2⁵ = 401973907 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 401973894 and 401973903.

It is not an unprimeable number, because it can be changed into a prime (401973919) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 9772 + ... + 29990.

Almost surely, 2^401973939 is an apocalyptic number.

401973939 is a deficient number, since it is larger than the sum of its proper divisors (191301081).

401973939 is a wasteful number, since it uses less digits than its factorization.

401973939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20319 (or 20269 counting only the distinct ones).

The product of its (nonzero) digits is 183708, while the sum is 45.

The square root of 401973939 is about 20049.2877429598. The cubic root of 401973939 is about 738.0163203917.

The spelling of 401973939 in words is "four hundred one million, nine hundred seventy-three thousand, nine hundred thirty-nine".