72699399 has 6 divisors (see below), whose sum is σ = 105010256. Its totient is φ = 48466260.

The previous prime is 72699391. The next prime is 72699427. The reversal of 72699399 is 99399627.

It is not a de Polignac number, because 72699399 - 2³ = 72699391 is a prime.

It is a super-2 number, since 2×72699399² = 10570405229922402, 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 (72699391) 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, 4038847 + ... + 4038864.

Almost surely, 2^72699399 is an apocalyptic number.

72699399 is a deficient number, since it is larger than the sum of its proper divisors (32310857).

72699399 is a wasteful number, since it uses less digits than its factorization.

72699399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8077717 (or 8077714 counting only the distinct ones).

The product of its digits is 1653372, while the sum is 54.

The square root of 72699399 is about 8526.3942554869. The cubic root of 72699399 is about 417.3594712716.

The spelling of 72699399 in words is "seventy-two million, six hundred ninety-nine thousand, three hundred ninety-nine".