72994189 has 4 divisors (see below), whose sum is σ = 75511260. Its totient is φ = 70477120.

The previous prime is 72994169. The next prime is 72994193. The reversal of 72994189 is 98149927.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 98149927 = 1061 ⋅92507.

It can be written as a sum of positive squares in 2 ways, for example, as 42380100 + 30614089 = 6510^2 + 5533^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72994189 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 (72994109) 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, 1258492 + ... + 1258549.

It is an arithmetic number, because the mean of its divisors is an integer number (18877815).

Almost surely, 2^72994189 is an apocalyptic number.

It is an amenable number.

72994189 is a deficient number, since it is larger than the sum of its proper divisors (2517071).

72994189 is a wasteful number, since it uses less digits than its factorization.

72994189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2517070.

The product of its digits is 326592, while the sum is 49.

The square root of 72994189 is about 8543.6636754966. The cubic root of 72994189 is about 417.9228297822.

The spelling of 72994189 in words is "seventy-two million, nine hundred ninety-four thousand, one hundred eighty-nine".