401689607 has 8 divisors (see below), whose sum is σ = 439955712. Its totient is φ = 363715000.

The previous prime is 401689601. The next prime is 401689619. The reversal of 401689607 is 706986104.

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

It is not a de Polignac number, because 401689607 - 2⁶ = 401689543 is a prime.

It is a super-2 number, since 2×401689607² = 322709080743628898, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401689601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69983 + ... + 75504.

It is an arithmetic number, because the mean of its divisors is an integer number (54994464).

Almost surely, 2^401689607 is an apocalyptic number.

401689607 is a deficient number, since it is larger than the sum of its proper divisors (38266105).

401689607 is a wasteful number, since it uses less digits than its factorization.

401689607 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145749.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 401689607 is about 20042.1956631503. The cubic root of 401689607 is about 737.8422700102.

The spelling of 401689607 in words is "four hundred one million, six hundred eighty-nine thousand, six hundred seven".