72467861 has 4 divisors (see below), whose sum is σ = 72626892. Its totient is φ = 72308832.

The previous prime is 72467849. The next prime is 72467911. The reversal of 72467861 is 16876427.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 68989636 + 3478225 = 8306^2 + 1865^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72467861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72467831) 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, 78830 + ... + 79743.

It is an arithmetic number, because the mean of its divisors is an integer number (18156723).

Almost surely, 2^72467861 is an apocalyptic number.

It is an amenable number.

72467861 is a deficient number, since it is larger than the sum of its proper divisors (159031).

72467861 is a wasteful number, since it uses less digits than its factorization.

72467861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159030.

The product of its digits is 112896, while the sum is 41.

The square root of 72467861 is about 8512.8057066986. The cubic root of 72467861 is about 416.9159217606.

The spelling of 72467861 in words is "seventy-two million, four hundred sixty-seven thousand, eight hundred sixty-one".