72870999 has 4 divisors (see below), whose sum is σ = 97161336. Its totient is φ = 48580664.

The previous prime is 72870991. The next prime is 72871003. The reversal of 72870999 is 99907827.

It is a happy number.

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 72870999 - 2³ = 72870991 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72870991) 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, 12145164 + ... + 12145169.

It is an arithmetic number, because the mean of its divisors is an integer number (24290334).

Almost surely, 2^72870999 is an apocalyptic number.

72870999 is a deficient number, since it is larger than the sum of its proper divisors (24290337).

72870999 is a wasteful number, since it uses less digits than its factorization.

72870999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24290336.

The product of its (nonzero) digits is 571536, while the sum is 51.

The square root of 72870999 is about 8536.4511947296. The cubic root of 72870999 is about 417.6875923206.

The spelling of 72870999 in words is "seventy-two million, eight hundred seventy thousand, nine hundred ninety-nine".