72397807 has 2 divisors, whose sum is σ = 72397808. Its totient is φ = 72397806.

The previous prime is 72397769. The next prime is 72397811. The reversal of 72397807 is 70879327.

It is a strong prime.

It is an emirp because it is prime and its reverse (70879327) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72397807 - 2¹¹ = 72395759 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72397867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36198903 + 36198904.

It is an arithmetic number, because the mean of its divisors is an integer number (36198904).

Almost surely, 2^72397807 is an apocalyptic number.

72397807 is a deficient number, since it is larger than the sum of its proper divisors (1).

72397807 is an equidigital number, since it uses as much as digits as its factorization.

72397807 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 148176, while the sum is 43.

The square root of 72397807 is about 8508.6900871991. The cubic root of 72397807 is about 416.7815355472.

The spelling of 72397807 in words is "seventy-two million, three hundred ninety-seven thousand, eight hundred seven".