970736561 has 4 divisors (see below), whose sum is σ = 971194224. Its totient is φ = 970278900.

The previous prime is 970736549. The next prime is 970736579. The reversal of 970736561 is 165637079.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 165637079 = 19 ⋅8717741.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-970736561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (970736531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 225635 + ... + 229896.

It is an arithmetic number, because the mean of its divisors is an integer number (242798556).

Almost surely, 2^970736561 is an apocalyptic number.

It is an amenable number.

970736561 is a deficient number, since it is larger than the sum of its proper divisors (457663).

970736561 is a wasteful number, since it uses less digits than its factorization.

970736561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 457662.

The product of its (nonzero) digits is 238140, while the sum is 44.

The square root of 970736561 is about 31156.6455351021. The cubic root of 970736561 is about 990.1487927229.

The spelling of 970736561 in words is "nine hundred seventy million, seven hundred thirty-six thousand, five hundred sixty-one".