72900863 has 4 divisors (see below), whose sum is σ = 83315280. Its totient is φ = 62486448.

The previous prime is 72900847. The next prime is 72900881. The reversal of 72900863 is 36800927.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36800927 = 97 ⋅379391.

It is a cyclic number.

It is not a de Polignac number, because 72900863 - 2⁴ = 72900847 is a prime.

It is a super-2 number, since 2×72900863² = 10629071652289538, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72900463) 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, 5207198 + ... + 5207211.

It is an arithmetic number, because the mean of its divisors is an integer number (20828820).

Almost surely, 2^72900863 is an apocalyptic number.

72900863 is a deficient number, since it is larger than the sum of its proper divisors (10414417).

72900863 is a wasteful number, since it uses less digits than its factorization.

72900863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10414416.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 72900863 is about 8538.2002201869. The cubic root of 72900863 is about 417.7446434512.

The spelling of 72900863 in words is "seventy-two million, nine hundred thousand, eight hundred sixty-three".