72698213 has 6 divisors (see below), whose sum is σ = 84567366. Its totient is φ = 62312712.

The previous prime is 72698209. The next prime is 72698231. The reversal of 72698213 is 31289627.

It can be written as a sum of positive squares in only one way, i.e., 49098049 + 23600164 = 7007^2 + 4858^2 .

It is not a de Polignac number, because 72698213 - 2² = 72698209 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 (72698203) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 741770 + ... + 741867.

It is an arithmetic number, because the mean of its divisors is an integer number (14094561).

Almost surely, 2^72698213 is an apocalyptic number.

It is an amenable number.

72698213 is a deficient number, since it is larger than the sum of its proper divisors (11869153).

72698213 is a wasteful number, since it uses less digits than its factorization.

72698213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1483651 (or 1483644 counting only the distinct ones).

The product of its digits is 36288, while the sum is 38.

The square root of 72698213 is about 8526.3247064606. The cubic root of 72698213 is about 417.3572016929.

The spelling of 72698213 in words is "seventy-two million, six hundred ninety-eight thousand, two hundred thirteen".