981715172 has 6 divisors (see below), whose sum is σ = 1718001558. Its totient is φ = 490857584.

The previous prime is 981715171. The next prime is 981715177. The reversal of 981715172 is 271517189.

It can be written as a sum of positive squares in only one way, i.e., 805197376 + 176517796 = 28376^2 + 13286^2 .

It is not an unprimeable number, because it can be changed into a prime (981715171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122714393 + ... + 122714400.

It is an arithmetic number, because the mean of its divisors is an integer number (286333593).

Almost surely, 2^981715172 is an apocalyptic number.

It is an amenable number.

981715172 is a deficient number, since it is larger than the sum of its proper divisors (736286386).

981715172 is a wasteful number, since it uses less digits than its factorization.

981715172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245428797 (or 245428795 counting only the distinct ones).

The product of its digits is 35280, while the sum is 41.

The square root of 981715172 is about 31332.3342890376. The cubic root of 981715172 is about 993.8675269831.

The spelling of 981715172 in words is "nine hundred eighty-one million, seven hundred fifteen thousand, one hundred seventy-two".