72573394 has 4 divisors (see below), whose sum is σ = 108860094. Its totient is φ = 36286696.

The previous prime is 72573383. The next prime is 72573401. The reversal of 72573394 is 49337527.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 49337527 = 67 ⋅736381.

It can be written as a sum of positive squares in only one way, i.e., 69639025 + 2934369 = 8345^2 + 1713^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18143347 + ... + 18143350.

Almost surely, 2^72573394 is an apocalyptic number.

72573394 is a deficient number, since it is larger than the sum of its proper divisors (36286700).

72573394 is a wasteful number, since it uses less digits than its factorization.

72573394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36286699.

The product of its digits is 158760, while the sum is 40.

The square root of 72573394 is about 8519.0019368468. The cubic root of 72573394 is about 417.1182047531.

The spelling of 72573394 in words is "seventy-two million, five hundred seventy-three thousand, three hundred ninety-four".