160970781 has 16 divisors (see below), whose sum is σ = 217861056. Its totient is φ = 105705216.

The previous prime is 160970779. The next prime is 160970819. The reversal of 160970781 is 187079061.

It is not a de Polignac number, because 160970781 - 2¹ = 160970779 is a prime.

It is a super-2 number, since 2×160970781² = 51823184671499922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (160970731) 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, 107071 + ... + 108563.

It is an arithmetic number, because the mean of its divisors is an integer number (13616316).

Almost surely, 2^160970781 is an apocalyptic number.

It is an amenable number.

160970781 is a deficient number, since it is larger than the sum of its proper divisors (56890275).

160970781 is a wasteful number, since it uses less digits than its factorization.

160970781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2012.

The product of its (nonzero) digits is 21168, while the sum is 39.

The square root of 160970781 is about 12687.4260983069. The cubic root of 160970781 is about 543.9792706292.

It can be divided in two parts, 1609 and 70781, that added together give a triangular number (72390 = T₃₈₀).

The spelling of 160970781 in words is "one hundred sixty million, nine hundred seventy thousand, seven hundred eighty-one".