172971603 has 12 divisors (see below), whose sum is σ = 285540528. Its totient is φ = 98840880.

The previous prime is 172971593. The next prime is 172971607. The reversal of 172971603 is 306179271.

It is a happy number.

It is not a de Polignac number, because 172971603 - 2¹³ = 172963411 is a prime.

It is not an unprimeable number, because it can be changed into a prime (172971607) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1372728 + ... + 1372853.

It is an arithmetic number, because the mean of its divisors is an integer number (23795044).

Almost surely, 2^172971603 is an apocalyptic number.

172971603 is a deficient number, since it is larger than the sum of its proper divisors (112568925).

172971603 is a wasteful number, since it uses less digits than its factorization.

172971603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2745594 (or 2745591 counting only the distinct ones).

The product of its (nonzero) digits is 15876, while the sum is 36.

The square root of 172971603 is about 13151.8669016988. The cubic root of 172971603 is about 557.1749764802.

The spelling of 172971603 in words is "one hundred seventy-two million, nine hundred seventy-one thousand, six hundred three".