72342997 has 2 divisors, whose sum is σ = 72342998. Its totient is φ = 72342996.

The previous prime is 72342923. The next prime is 72343001. The reversal of 72342997 is 79924327.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52620516 + 19722481 = 7254^2 + 4441^2 .

It is a cyclic number.

It is not a de Polignac number, because 72342997 - 2⁷ = 72342869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72382997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36171498 + 36171499.

It is an arithmetic number, because the mean of its divisors is an integer number (36171499).

Almost surely, 2^72342997 is an apocalyptic number.

It is an amenable number.

72342997 is a deficient number, since it is larger than the sum of its proper divisors (1).

72342997 is an equidigital number, since it uses as much as digits as its factorization.

72342997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 190512, while the sum is 43.

The square root of 72342997 is about 8505.4686525788. The cubic root of 72342997 is about 416.6763317936.

The spelling of 72342997 in words is "seventy-two million, three hundred forty-two thousand, nine hundred ninety-seven".