970816181 has 4 divisors (see below), whose sum is σ = 1002132864. Its totient is φ = 939499500.

The previous prime is 970816139. The next prime is 970816193. The reversal of 970816181 is 181618079.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-970816181 is a prime.

It is a super-2 number, since 2×970816181² = 1884968114582849522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (970806181) 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, 15658295 + ... + 15658356.

It is an arithmetic number, because the mean of its divisors is an integer number (250533216).

Almost surely, 2^970816181 is an apocalyptic number.

It is an amenable number.

970816181 is a deficient number, since it is larger than the sum of its proper divisors (31316683).

970816181 is a wasteful number, since it uses less digits than its factorization.

970816181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31316682.

The product of its (nonzero) digits is 24192, while the sum is 41.

The square root of 970816181 is about 31157.9232459418. The cubic root of 970816181 is about 990.1758627145.

The spelling of 970816181 in words is "nine hundred seventy million, eight hundred sixteen thousand, one hundred eighty-one".