72353737 has 4 divisors (see below), whose sum is σ = 72622980. Its totient is φ = 72084496.

The previous prime is 72353693. The next prime is 72353773. The reversal of 72353737 is 73735327.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 73735327 = 197 ⋅374291.

It can be written as a sum of positive squares in 2 ways, for example, as 5588496 + 66765241 = 2364^2 + 8171^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72353737 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72353696 and 72353705.

It is not an unprimeable number, because it can be changed into a prime (72353777) 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, 134218 + ... + 134755.

It is an arithmetic number, because the mean of its divisors is an integer number (18155745).

Almost surely, 2^72353737 is an apocalyptic number.

It is an amenable number.

72353737 is a deficient number, since it is larger than the sum of its proper divisors (269243).

72353737 is a wasteful number, since it uses less digits than its factorization.

72353737 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269242.

The product of its digits is 92610, while the sum is 37.

The square root of 72353737 is about 8506.0999876559. The cubic root of 72353737 is about 416.6969506166.

The spelling of 72353737 in words is "seventy-two million, three hundred fifty-three thousand, seven hundred thirty-seven".