72199497 has 4 divisors (see below), whose sum is σ = 96266000. Its totient is φ = 48132996.

The previous prime is 72199481. The next prime is 72199499. The reversal of 72199497 is 79499127.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 79499127 = 3 ⋅26499709.

It is not a de Polignac number, because 72199497 - 2⁴ = 72199481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72199499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12033247 + ... + 12033252.

It is an arithmetic number, because the mean of its divisors is an integer number (24066500).

Almost surely, 2^72199497 is an apocalyptic number.

It is an amenable number.

72199497 is a deficient number, since it is larger than the sum of its proper divisors (24066503).

72199497 is a wasteful number, since it uses less digits than its factorization.

72199497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24066502.

The product of its digits is 285768, while the sum is 48.

The square root of 72199497 is about 8497.0287159689. The cubic root of 72199497 is about 416.4006422083.

The spelling of 72199497 in words is "seventy-two million, one hundred ninety-nine thousand, four hundred ninety-seven".