172999149 has 8 divisors (see below), whose sum is σ = 230774592. Its totient is φ = 115278240.

The previous prime is 172999147. The next prime is 172999171. The reversal of 172999149 is 941999271.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 172999149 - 2¹ = 172999147 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172999147) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5544 + ... + 19409.

It is an arithmetic number, because the mean of its divisors is an integer number (28846824).

Almost surely, 2^172999149 is an apocalyptic number.

It is an amenable number.

172999149 is a deficient number, since it is larger than the sum of its proper divisors (57775443).

172999149 is a wasteful number, since it uses less digits than its factorization.

172999149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27267.

The product of its digits is 367416, while the sum is 51.

The square root of 172999149 is about 13152.9140877602. The cubic root of 172999149 is about 557.2045519076.

The spelling of 172999149 in words is "one hundred seventy-two million, nine hundred ninety-nine thousand, one hundred forty-nine".