191795649 has 16 divisors (see below), whose sum is σ = 271091520. Its totient is φ = 120199680.

The previous prime is 191795627. The next prime is 191795657. The reversal of 191795649 is 946597191.

191795649 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 191795649 - 2¹² = 191791553 is a prime.

It is a super-3 number, since 3×191795649³ (a number of 26 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (191795449) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55914 + ... + 59244.

It is an arithmetic number, because the mean of its divisors is an integer number (16943220).

Almost surely, 2^191795649 is an apocalyptic number.

It is an amenable number.

191795649 is a deficient number, since it is larger than the sum of its proper divisors (79295871).

191795649 is a wasteful number, since it uses less digits than its factorization.

191795649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4480.

The product of its digits is 612360, while the sum is 51.

The square root of 191795649 is about 13849.0306158951. The cubic root of 191795649 is about 576.6950852304.

The spelling of 191795649 in words is "one hundred ninety-one million, seven hundred ninety-five thousand, six hundred forty-nine".