971661313 has 8 divisors (see below), whose sum is σ = 1110682880. Its totient is φ = 832692960.

The previous prime is 971661287. The next prime is 971661323. The reversal of 971661313 is 313166179.

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 971661313 - 2⁹ = 971660801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (971661323) 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, 40168 + ... + 59638.

It is an arithmetic number, because the mean of its divisors is an integer number (138835360).

Almost surely, 2^971661313 is an apocalyptic number.

It is an amenable number.

971661313 is a deficient number, since it is larger than the sum of its proper divisors (139021567).

971661313 is a wasteful number, since it uses less digits than its factorization.

971661313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26607.

The product of its digits is 20412, while the sum is 37.

The square root of 971661313 is about 31171.4823677027. The cubic root of 971661313 is about 990.4631078217.

The spelling of 971661313 in words is "nine hundred seventy-one million, six hundred sixty-one thousand, three hundred thirteen".