72407669 has 2 divisors, whose sum is σ = 72407670. Its totient is φ = 72407668.

The previous prime is 72407663. The next prime is 72407701. The reversal of 72407669 is 96670427.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53831569 + 18576100 = 7337^2 + 4310^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72407669 is a prime.

It is a super-2 number, since 2×72407669² = 10485741060027122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72407663) 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, 36203834 + 36203835.

It is an arithmetic number, because the mean of its divisors is an integer number (36203835).

Almost surely, 2^72407669 is an apocalyptic number.

It is an amenable number.

72407669 is a deficient number, since it is larger than the sum of its proper divisors (1).

72407669 is an equidigital number, since it uses as much as digits as its factorization.

72407669 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 127008, while the sum is 41.

The square root of 72407669 is about 8509.2695926266. The cubic root of 72407669 is about 416.8004592921.

The spelling of 72407669 in words is "seventy-two million, four hundred seven thousand, six hundred sixty-nine".