72837994 has 4 divisors (see below), whose sum is σ = 109256994. Its totient is φ = 36418996.

The previous prime is 72837991. The next prime is 72837997. The reversal of 72837994 is 49973827.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 49973827 = 5023 ⋅9949.

It is an interprime number because it is at equal distance from previous prime (72837991) and next prime (72837997).

It can be written as a sum of positive squares in only one way, i.e., 53802225 + 19035769 = 7335^2 + 4363^2 .

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (72837991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18209497 + ... + 18209500.

Almost surely, 2^72837994 is an apocalyptic number.

72837994 is a deficient number, since it is larger than the sum of its proper divisors (36419000).

72837994 is a wasteful number, since it uses less digits than its factorization.

72837994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36418999.

The product of its digits is 762048, while the sum is 49.

The square root of 72837994 is about 8534.5177954000. The cubic root of 72837994 is about 417.6245225993.

The spelling of 72837994 in words is "seventy-two million, eight hundred thirty-seven thousand, nine hundred ninety-four".