72810739 has 4 divisors (see below), whose sum is σ = 74504056. Its totient is φ = 71117424.

The previous prime is 72810737. The next prime is 72810743. The reversal of 72810739 is 93701827.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93701827 = 53 ⋅1767959.

It is a cyclic number.

It is not a de Polignac number, because 72810739 - 2¹ = 72810737 is a prime.

It is a super-2 number, since 2×72810739² = 10602807427452242, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72810698 and 72810707.

It is not an unprimeable number, because it can be changed into a prime (72810733) 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, 846594 + ... + 846679.

It is an arithmetic number, because the mean of its divisors is an integer number (18626014).

Almost surely, 2^72810739 is an apocalyptic number.

72810739 is a deficient number, since it is larger than the sum of its proper divisors (1693317).

72810739 is a wasteful number, since it uses less digits than its factorization.

72810739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1693316.

The product of its (nonzero) digits is 21168, while the sum is 37.

The square root of 72810739 is about 8532.9208949808. The cubic root of 72810739 is about 417.5724262700.

The spelling of 72810739 in words is "seventy-two million, eight hundred ten thousand, seven hundred thirty-nine".