196491965 has 16 divisors (see below), whose sum is σ = 246354480. Its totient is φ = 150259200.

The previous prime is 196491961. The next prime is 196491979. The reversal of 196491965 is 569194691.

It can be written as a sum of positive squares in 8 ways, for example, as 5692996 + 190798969 = 2386^2 + 13813^2 .

It is not a de Polignac number, because 196491965 - 2² = 196491961 is a prime.

It is a super-2 number, since 2×196491965² = 77218184619122450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (196491961) 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, 7937 + ... + 21353.

It is an arithmetic number, because the mean of its divisors is an integer number (15397155).

Almost surely, 2^196491965 is an apocalyptic number.

It is an amenable number.

196491965 is a deficient number, since it is larger than the sum of its proper divisors (49862515).

196491965 is a wasteful number, since it uses less digits than its factorization.

196491965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13552.

The product of its digits is 524880, while the sum is 50.

The square root of 196491965 is about 14017.5591669877. The cubic root of 196491965 is about 581.3641739719.

The spelling of 196491965 in words is "one hundred ninety-six million, four hundred ninety-one thousand, nine hundred sixty-five".