72177149 has 8 divisors (see below), whose sum is σ = 80224992. Its totient is φ = 64377040.

The previous prime is 72177113. The next prime is 72177167. The reversal of 72177149 is 94177127.

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

It is a cyclic number.

It is not a de Polignac number, because 72177149 - 2²⁰ = 71128573 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72177449) 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, 61319 + ... + 62484.

It is an arithmetic number, because the mean of its divisors is an integer number (10028124).

Almost surely, 2^72177149 is an apocalyptic number.

It is an amenable number.

72177149 is a deficient number, since it is larger than the sum of its proper divisors (8047843).

72177149 is a wasteful number, since it uses less digits than its factorization.

72177149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123867.

The product of its digits is 24696, while the sum is 38.

The square root of 72177149 is about 8495.7135662639. The cubic root of 72177149 is about 416.3576747720.

The spelling of 72177149 in words is "seventy-two million, one hundred seventy-seven thousand, one hundred forty-nine".