72403097 has 8 divisors (see below), whose sum is σ = 78059016. Its totient is φ = 66759552.

The previous prime is 72403087. The next prime is 72403109. The reversal of 72403097 is 79030427.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 10686361 + 61716736 = 3269^2 + 7856^2 .

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 72403097 - 2¹⁰ = 72402073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72403027) 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, 11723 + ... + 16799.

It is an arithmetic number, because the mean of its divisors is an integer number (9757377).

Almost surely, 2^72403097 is an apocalyptic number.

It is an amenable number.

72403097 is a deficient number, since it is larger than the sum of its proper divisors (5655919).

72403097 is a wasteful number, since it uses less digits than its factorization.

72403097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6187.

The product of its (nonzero) digits is 10584, while the sum is 32.

The square root of 72403097 is about 8509.0009401809. Note that the first 3 decimals coincide. The cubic root of 72403097 is about 416.7916865021.

The spelling of 72403097 in words is "seventy-two million, four hundred three thousand, ninety-seven".