3709497961 has 4 divisors (see below), whose sum is σ = 3994843972. Its totient is φ = 3424151952.

The previous prime is 3709497943. The next prime is 3709497977. The reversal of 3709497961 is 1697949073.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2355257961 + 1354240000 = 48531^2 + 36800^2 .

It is not a de Polignac number, because 3709497961 - 2⁷ = 3709497833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3709497941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 142672986 + ... + 142673011.

It is an arithmetic number, because the mean of its divisors is an integer number (998710993).

Almost surely, 2^3709497961 is an apocalyptic number.

It is an amenable number.

3709497961 is a deficient number, since it is larger than the sum of its proper divisors (285346011).

3709497961 is a wasteful number, since it uses less digits than its factorization.

3709497961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285346010.

The product of its (nonzero) digits is 2571912, while the sum is 55.

The square root of 3709497961 is about 60905.6480221662. The cubic root of 3709497961 is about 1548.0026942834.

The spelling of 3709497961 in words is "three billion, seven hundred nine million, four hundred ninety-seven thousand, nine hundred sixty-one".