72802871 has 4 divisors (see below), whose sum is σ = 73079952. Its totient is φ = 72525792.

The previous prime is 72802853. The next prime is 72802879. The reversal of 72802871 is 17820827.

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

It is a cyclic number.

It is not a de Polignac number, because 72802871 - 2²² = 68608567 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 (72802879) 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, 138146 + ... + 138671.

It is an arithmetic number, because the mean of its divisors is an integer number (18269988).

Almost surely, 2^72802871 is an apocalyptic number.

72802871 is a deficient number, since it is larger than the sum of its proper divisors (277081).

72802871 is a wasteful number, since it uses less digits than its factorization.

72802871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277080.

The product of its (nonzero) digits is 12544, while the sum is 35.

The square root of 72802871 is about 8532.4598446169. The cubic root of 72802871 is about 417.5573846326.

The spelling of 72802871 in words is "seventy-two million, eight hundred two thousand, eight hundred seventy-one".