172453939 has 12 divisors (see below), whose sum is σ = 198390544. Its totient is φ = 146847744.

The previous prime is 172453909. The next prime is 172453949. The reversal of 172453939 is 939354271.

It is not a de Polignac number, because 172453939 - 2¹¹ = 172451891 is a prime.

It is a super-2 number, since 2×172453939² = 59480722153231442, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 172453895 and 172453904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172453909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 462157 + ... + 462529.

Almost surely, 2^172453939 is an apocalyptic number.

172453939 is a deficient number, since it is larger than the sum of its proper divisors (25936605).

172453939 is an frugal number, since it uses more digits than its factorization.

172453939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 894 (or 637 counting only the distinct ones).

The product of its digits is 204120, while the sum is 43.

The square root of 172453939 is about 13132.1719071904. The cubic root of 172453939 is about 556.6185891204.

The spelling of 172453939 in words is "one hundred seventy-two million, four hundred fifty-three thousand, nine hundred thirty-nine".