191603023 has 4 divisors (see below), whose sum is σ = 191632480. Its totient is φ = 191573568.

The previous prime is 191602979. The next prime is 191603063. The reversal of 191603023 is 320306191.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 191603023 - 2¹³ = 191594831 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191603063) 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, 183 + ... + 19576.

It is an arithmetic number, because the mean of its divisors is an integer number (47908120).

Almost surely, 2^191603023 is an apocalyptic number.

191603023 is a deficient number, since it is larger than the sum of its proper divisors (29457).

191603023 is an equidigital number, since it uses as much as digits as its factorization.

191603023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29456.

The product of its (nonzero) digits is 972, while the sum is 25.

The square root of 191603023 is about 13842.0743748905. The cubic root of 191603023 is about 576.5019566272.

The spelling of 191603023 in words is "one hundred ninety-one million, six hundred three thousand, twenty-three".