172696972 has 72 divisors (see below), whose sum is σ = 379784160. Its totient is φ = 68302080.

The previous prime is 172696969. The next prime is 172696973. The reversal of 172696972 is 279696271.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is not an unprimeable number, because it can be changed into a prime (172696973) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 130072 + ... + 131392.

It is an arithmetic number, because the mean of its divisors is an integer number (5274780).

Almost surely, 2^172696972 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 172696972, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (189892080).

172696972 is an abundant number, since it is smaller than the sum of its proper divisors (207087188).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

172696972 is a wasteful number, since it uses less digits than its factorization.

172696972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1391 (or 1382 counting only the distinct ones).

The product of its digits is 571536, while the sum is 49.

The square root of 172696972 is about 13141.4219930721. The cubic root of 172696972 is about 556.8799404300.

The spelling of 172696972 in words is "one hundred seventy-two million, six hundred ninety-six thousand, nine hundred seventy-two".