195697761 has 32 divisors (see below), whose sum is σ = 325951488. Its totient is φ = 101848320.

The previous prime is 195697759. The next prime is 195697763. The reversal of 195697761 is 167796591.

It is an interprime number because it is at equal distance from previous prime (195697759) and next prime (195697763).

It is not a de Polignac number, because 195697761 - 2¹ = 195697759 is a prime.

It is a super-2 number, since 2×195697761² = 76595227320826242, which contains 22 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 (195697763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2226 + ... + 19908.

It is an arithmetic number, because the mean of its divisors is an integer number (10185984).

Almost surely, 2^195697761 is an apocalyptic number.

It is an amenable number.

195697761 is a deficient number, since it is larger than the sum of its proper divisors (130253727).

195697761 is a wasteful number, since it uses less digits than its factorization.

195697761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17741.

The product of its digits is 714420, while the sum is 51.

The square root of 195697761 is about 13989.2015855087. The cubic root of 195697761 is about 580.5798412499.

The spelling of 195697761 in words is "one hundred ninety-five million, six hundred ninety-seven thousand, seven hundred sixty-one".