401959947 has 4 divisors (see below), whose sum is σ = 535946600. Its totient is φ = 267973296.

The previous prime is 401959939. The next prime is 401959993. The reversal of 401959947 is 749959104.

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

It is not a de Polignac number, because 401959947 - 2³ = 401959939 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 401959896 and 401959905.

It is not an unprimeable number, because it can be changed into a prime (401959907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66993322 + ... + 66993327.

It is an arithmetic number, because the mean of its divisors is an integer number (133986650).

Almost surely, 2^401959947 is an apocalyptic number.

401959947 is a deficient number, since it is larger than the sum of its proper divisors (133986653).

401959947 is a wasteful number, since it uses less digits than its factorization.

401959947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133986652.

The product of its (nonzero) digits is 408240, while the sum is 48.

The square root of 401959947 is about 20048.9387998467. The cubic root of 401959947 is about 738.0077572792.

The spelling of 401959947 in words is "four hundred one million, nine hundred fifty-nine thousand, nine hundred forty-seven".