191346023 has 4 divisors (see below), whose sum is σ = 208741128. Its totient is φ = 173950920.

The previous prime is 191346019. The next prime is 191346053. The reversal of 191346023 is 320643191.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 320643191 = 11 ⋅29149381.

It is not a de Polignac number, because 191346023 - 2² = 191346019 is a prime.

It is a super-2 number, since 2×191346023² = 73226601035833058, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191346013) 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, 8697536 + ... + 8697557.

It is an arithmetic number, because the mean of its divisors is an integer number (52185282).

Almost surely, 2^191346023 is an apocalyptic number.

191346023 is a deficient number, since it is larger than the sum of its proper divisors (17395105).

191346023 is a wasteful number, since it uses less digits than its factorization.

191346023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17395104.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 191346023 is about 13832.7879691695. The cubic root of 191346023 is about 576.2440843984.

The spelling of 191346023 in words is "one hundred ninety-one million, three hundred forty-six thousand, twenty-three".