72010691 has 4 divisors (see below), whose sum is σ = 76246632. Its totient is φ = 67774752.

The previous prime is 72010667. The next prime is 72010711. The reversal of 72010691 is 19601027.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19601027 = 19 ⋅1031633.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72010691 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72010691.

It is not an unprimeable number, because it can be changed into a prime (72010661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2117945 + ... + 2117978.

It is an arithmetic number, because the mean of its divisors is an integer number (19061658).

Almost surely, 2^72010691 is an apocalyptic number.

72010691 is a deficient number, since it is larger than the sum of its proper divisors (4235941).

72010691 is a wasteful number, since it uses less digits than its factorization.

72010691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4235940.

The product of its (nonzero) digits is 756, while the sum is 26.

The square root of 72010691 is about 8485.9113240712. The cubic root of 72010691 is about 416.0373544952.

It can be divided in two parts, 720 and 10691, that added together give a palindrome (11411).

The spelling of 72010691 in words is "seventy-two million, ten thousand, six hundred ninety-one".