401965939 has 4 divisors (see below), whose sum is σ = 409550256. Its totient is φ = 394381624.

The previous prime is 401965931. The next prime is 401965979. The reversal of 401965939 is 939569104.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 401965939 - 2³ = 401965931 is a prime.

It is a super-2 number, since 2×401965939² = 323153232232303442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (401965931) 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, 3792079 + ... + 3792184.

It is an arithmetic number, because the mean of its divisors is an integer number (102387564).

Almost surely, 2^401965939 is an apocalyptic number.

401965939 is a deficient number, since it is larger than the sum of its proper divisors (7584317).

401965939 is an equidigital number, since it uses as much as digits as its factorization.

401965939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7584316.

The product of its (nonzero) digits is 262440, while the sum is 46.

The square root of 401965939 is about 20049.0882336330. The cubic root of 401965939 is about 738.0114244112.

The spelling of 401965939 in words is "four hundred one million, nine hundred sixty-five thousand, nine hundred thirty-nine".