72953786 has 4 divisors (see below), whose sum is σ = 109430682. Its totient is φ = 36476892.

The previous prime is 72953773. The next prime is 72953789. The reversal of 72953786 is 68735927.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 68735927 = 13 ⋅5287379.

It can be written as a sum of positive squares in only one way, i.e., 61858225 + 11095561 = 7865^2 + 3331^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 72953786.

It is not an unprimeable number, because it can be changed into a prime (72953789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18238445 + ... + 18238448.

Almost surely, 2^72953786 is an apocalyptic number.

72953786 is a deficient number, since it is larger than the sum of its proper divisors (36476896).

72953786 is a wasteful number, since it uses less digits than its factorization.

72953786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36476895.

The product of its digits is 635040, while the sum is 47.

The square root of 72953786 is about 8541.2988473651. The cubic root of 72953786 is about 417.8457074218.

The spelling of 72953786 in words is "seventy-two million, nine hundred fifty-three thousand, seven hundred eighty-six".