72399929 has 8 divisors (see below), whose sum is σ = 86340480. Its totient is φ = 59358816.

The previous prime is 72399893. The next prime is 72399959. The reversal of 72399929 is 92999327.

72399929 = T₁₄₁₄ + T₁₄₁₅ + ... + T₁₄₈₂.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 72399929 - 2¹⁶ = 72334393 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (72399959) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 224684 + ... + 225005.

It is an arithmetic number, because the mean of its divisors is an integer number (10792560).

Almost surely, 2^72399929 is an apocalyptic number.

It is an amenable number.

72399929 is a deficient number, since it is larger than the sum of its proper divisors (13940551).

72399929 is a wasteful number, since it uses less digits than its factorization.

72399929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449719.

The product of its digits is 551124, while the sum is 50.

The square root of 72399929 is about 8508.8147823301. The cubic root of 72399929 is about 416.7856075019.

The spelling of 72399929 in words is "seventy-two million, three hundred ninety-nine thousand, nine hundred twenty-nine".