172977453 has 12 divisors (see below), whose sum is σ = 272570688. Its totient is φ = 104834760.

The previous prime is 172977449. The next prime is 172977461. The reversal of 172977453 is 354779271.

It is not a de Polignac number, because 172977453 - 2² = 172977449 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 172977399 and 172977408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172977473) 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, 873525 + ... + 873722.

It is an arithmetic number, because the mean of its divisors is an integer number (22714224).

Almost surely, 2^172977453 is an apocalyptic number.

It is an amenable number.

172977453 is a deficient number, since it is larger than the sum of its proper divisors (99593235).

172977453 is a wasteful number, since it uses less digits than its factorization.

172977453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1747264 (or 1747261 counting only the distinct ones).

The product of its digits is 370440, while the sum is 45.

The square root of 172977453 is about 13152.0893017041. The cubic root of 172977453 is about 557.1812577364.

The spelling of 172977453 in words is "one hundred seventy-two million, nine hundred seventy-seven thousand, four hundred fifty-three".