354405631 has 4 divisors (see below), whose sum is σ = 354443472. Its totient is φ = 354367792.

The previous prime is 354405619. The next prime is 354405731. The reversal of 354405631 is 136504453.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 354405631 - 2⁷ = 354405503 is a prime.

It is a super-2 number, since 2×354405631² = 251206702569016322, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 354405593 and 354405602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (354405131) 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, 6630 + ... + 27436.

It is an arithmetic number, because the mean of its divisors is an integer number (88610868).

Almost surely, 2^354405631 is an apocalyptic number.

354405631 is a deficient number, since it is larger than the sum of its proper divisors (37841).

354405631 is a wasteful number, since it uses less digits than its factorization.

354405631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37840.

The product of its (nonzero) digits is 21600, while the sum is 31.

The square root of 354405631 is about 18825.6641582708. The cubic root of 354405631 is about 707.6744855513.

The spelling of 354405631 in words is "three hundred fifty-four million, four hundred five thousand, six hundred thirty-one".