72373997 has 2 divisors, whose sum is σ = 72373998. Its totient is φ = 72373996.

The previous prime is 72373969. The next prime is 72374039. The reversal of 72373997 is 79937327.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44769481 + 27604516 = 6691^2 + 5254^2 .

It is a cyclic number.

It is not a de Polignac number, because 72373997 - 2²² = 68179693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72373957) 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 as a sum of consecutive naturals, namely, 36186998 + 36186999.

It is an arithmetic number, because the mean of its divisors is an integer number (36186999).

Almost surely, 2^72373997 is an apocalyptic number.

It is an amenable number.

72373997 is a deficient number, since it is larger than the sum of its proper divisors (1).

72373997 is an equidigital number, since it uses as much as digits as its factorization.

72373997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 500094, while the sum is 47.

The square root of 72373997 is about 8507.2908143545. The cubic root of 72373997 is about 416.7358405331.

The spelling of 72373997 in words is "seventy-two million, three hundred seventy-three thousand, nine hundred ninety-seven".