170961956 has 12 divisors (see below), whose sum is σ = 326382000. Its totient is φ = 77709960.

The previous prime is 170961949. The next prime is 170961961. The reversal of 170961956 is 659169071.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (44), and also a Moran number because the ratio is a prime number: 3885499 = 170961956 / (1 + 7 + 0 + 9 + 6 + 1 + 9 + 5 + 6).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1942706 + ... + 1942793.

It is an arithmetic number, because the mean of its divisors is an integer number (27198500).

Almost surely, 2^170961956 is an apocalyptic number.

It is an amenable number.

170961956 is a deficient number, since it is larger than the sum of its proper divisors (155420044).

170961956 is a wasteful number, since it uses less digits than its factorization.

170961956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3885514 (or 3885512 counting only the distinct ones).

The product of its (nonzero) digits is 102060, while the sum is 44.

The square root of 170961956 is about 13075.2421010091. The cubic root of 170961956 is about 555.0087448234.

The spelling of 170961956 in words is "one hundred seventy million, nine hundred sixty-one thousand, nine hundred fifty-six".