191396965 has 8 divisors (see below), whose sum is σ = 243186840. Its totient is φ = 144110592.

The previous prime is 191396963. The next prime is 191397029. The reversal of 191396965 is 569693191.

It can be written as a sum of positive squares in 4 ways, for example, as 7279204 + 184117761 = 2698^2 + 13569^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 191396965 - 2¹ = 191396963 is a prime.

It is a super-2 number, since 2×191396965² = 73265596422422450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191396963) 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, 1125780 + ... + 1125949.

It is an arithmetic number, because the mean of its divisors is an integer number (30398355).

Almost surely, 2^191396965 is an apocalyptic number.

It is an amenable number.

191396965 is a deficient number, since it is larger than the sum of its proper divisors (51789875).

191396965 is a wasteful number, since it uses less digits than its factorization.

191396965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2251751.

The product of its digits is 393660, while the sum is 49.

The square root of 191396965 is about 13834.6291963319. The cubic root of 191396965 is about 576.2952176299.

The spelling of 191396965 in words is "one hundred ninety-one million, three hundred ninety-six thousand, nine hundred sixty-five".