199940523 has 8 divisors (see below), whose sum is σ = 267101136. Its totient is φ = 133036800.

The previous prime is 199940479. The next prime is 199940537. The reversal of 199940523 is 325049991.

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

It is not a de Polignac number, because 199940523 - 2¹⁴ = 199924139 is a prime.

It is not an unprimeable number, because it can be changed into a prime (199940023) 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, 62398 + ... + 65523.

It is an arithmetic number, because the mean of its divisors is an integer number (33387642).

Almost surely, 2^199940523 is an apocalyptic number.

199940523 is a deficient number, since it is larger than the sum of its proper divisors (67160613).

199940523 is a wasteful number, since it uses less digits than its factorization.

199940523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128445.

The product of its (nonzero) digits is 87480, while the sum is 42.

The square root of 199940523 is about 14140.0326378690. The cubic root of 199940523 is about 584.7455712941.

The spelling of 199940523 in words is "one hundred ninety-nine million, nine hundred forty thousand, five hundred twenty-three".