401684631 has 8 divisors (see below), whose sum is σ = 543573504. Its totient is φ = 263792760.

The previous prime is 401684623. The next prime is 401684641. The reversal of 401684631 is 136486104.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 401684631 - 2³ = 401684623 is a prime.

It is a super-2 number, since 2×401684631² = 322701085563212322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 401684592 and 401684601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401684611) 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 7 ways as a sum of consecutive naturals, for example, 999015 + ... + 999416.

It is an arithmetic number, because the mean of its divisors is an integer number (67946688).

Almost surely, 2^401684631 is an apocalyptic number.

401684631 is a deficient number, since it is larger than the sum of its proper divisors (141888873).

401684631 is a wasteful number, since it uses less digits than its factorization.

401684631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1998501.

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 401684631 is about 20042.0715246703. The cubic root of 401684631 is about 737.8392232811.

The spelling of 401684631 in words is "four hundred one million, six hundred eighty-four thousand, six hundred thirty-one".