72170703 has 16 divisors (see below), whose sum is σ = 116640000. Its totient is φ = 43739640.

The previous prime is 72170699. The next prime is 72170731. The reversal of 72170703 is 30707127.

It is not a de Polignac number, because 72170703 - 2² = 72170699 is a prime.

It is a super-2 number, since 2×72170703² = 10417220743028418, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72100703) 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, 121203 + ... + 121796.

It is an arithmetic number, because the mean of its divisors is an integer number (7290000).

Almost surely, 2^72170703 is an apocalyptic number.

72170703 is a deficient number, since it is larger than the sum of its proper divisors (44469297).

72170703 is a wasteful number, since it uses less digits than its factorization.

72170703 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243019 (or 243013 counting only the distinct ones).

The product of its (nonzero) digits is 2058, while the sum is 27.

The square root of 72170703 is about 8495.3341900128. The cubic root of 72170703 is about 416.3452797065.

The spelling of 72170703 in words is "seventy-two million, one hundred seventy thousand, seven hundred three".