72146077 has 4 divisors (see below), whose sum is σ = 72164736. Its totient is φ = 72127420.

The previous prime is 72146071. The next prime is 72146099. The reversal of 72146077 is 77064127.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72146077 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 (72146071) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1123 + ... + 12064.

It is an arithmetic number, because the mean of its divisors is an integer number (18041184).

Almost surely, 2^72146077 is an apocalyptic number.

It is an amenable number.

72146077 is a deficient number, since it is larger than the sum of its proper divisors (18659).

72146077 is a wasteful number, since it uses less digits than its factorization.

72146077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18658.

The product of its (nonzero) digits is 16464, while the sum is 34.

The square root of 72146077 is about 8493.8846825231. The cubic root of 72146077 is about 416.2979193751.

The spelling of 72146077 in words is "seventy-two million, one hundred forty-six thousand, seventy-seven".