409930191 has 12 divisors (see below), whose sum is σ = 645950760. Its totient is φ = 248442480.

The previous prime is 409930159. The next prime is 409930211. The reversal of 409930191 is 191039904.

It is not a de Polignac number, because 409930191 - 2⁵ = 409930159 is a prime.

It is a super-2 number, since 2×409930191² = 336085522986592962, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (409930151) 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, 2070256 + ... + 2070453.

It is an arithmetic number, because the mean of its divisors is an integer number (53829230).

Almost surely, 2^409930191 is an apocalyptic number.

409930191 is a deficient number, since it is larger than the sum of its proper divisors (236020569).

409930191 is a wasteful number, since it uses less digits than its factorization.

409930191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4140726 (or 4140723 counting only the distinct ones).

The product of its (nonzero) digits is 8748, while the sum is 36.

The square root of 409930191 is about 20246.7328475485. The cubic root of 409930191 is about 742.8537184841.

The spelling of 409930191 in words is "four hundred nine million, nine hundred thirty thousand, one hundred ninety-one".