72869697 has 6 divisors (see below), whose sum is σ = 105256242. Its totient is φ = 48579792.

The previous prime is 72869689. The next prime is 72869707. The reversal of 72869697 is 79696827.

It can be written as a sum of positive squares in only one way, i.e., 52403121 + 20466576 = 7239^2 + 4524^2 .

It is not a de Polignac number, because 72869697 - 2³ = 72869689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72869297) 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, 4048308 + ... + 4048325.

It is an arithmetic number, because the mean of its divisors is an integer number (17542707).

Almost surely, 2^72869697 is an apocalyptic number.

It is an amenable number.

72869697 is a deficient number, since it is larger than the sum of its proper divisors (32386545).

72869697 is a wasteful number, since it uses less digits than its factorization.

72869697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8096639 (or 8096636 counting only the distinct ones).

The product of its digits is 2286144, while the sum is 54.

The square root of 72869697 is about 8536.3749331903. The cubic root of 72869697 is about 417.6851046713.

The spelling of 72869697 in words is "seventy-two million, eight hundred sixty-nine thousand, six hundred ninety-seven".