401689953 has 12 divisors (see below), whose sum is σ = 663107328. Its totient is φ = 229537080.

The previous prime is 401689949. The next prime is 401690011. The reversal of 401689953 is 359986104.

It is a happy number.

It is not a de Polignac number, because 401689953 - 2² = 401689949 is a prime.

It is a super-2 number, since 2×401689953² = 322709636682284418, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 401689899 and 401689908.

It is not an unprimeable number, because it can be changed into a prime (401689153) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3187953 + ... + 3188078.

It is an arithmetic number, because the mean of its divisors is an integer number (55258944).

Almost surely, 2^401689953 is an apocalyptic number.

It is an amenable number.

401689953 is a deficient number, since it is larger than the sum of its proper divisors (261417375).

401689953 is a wasteful number, since it uses less digits than its factorization.

401689953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6376044 (or 6376041 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 45.

The square root of 401689953 is about 20042.2042949372. The cubic root of 401689953 is about 737.8424818598.

The spelling of 401689953 in words is "four hundred one million, six hundred eighty-nine thousand, nine hundred fifty-three".