72424357 has 2 divisors, whose sum is σ = 72424358. Its totient is φ = 72424356.

The previous prime is 72424351. The next prime is 72424411. The reversal of 72424357 is 75342427.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59814756 + 12609601 = 7734^2 + 3551^2 .

It is an emirp because it is prime and its reverse (75342427) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72424357 - 2⁷ = 72424229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72424351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36212178 + 36212179.

It is an arithmetic number, because the mean of its divisors is an integer number (36212179).

Almost surely, 2^72424357 is an apocalyptic number.

It is an amenable number.

72424357 is a deficient number, since it is larger than the sum of its proper divisors (1).

72424357 is an equidigital number, since it uses as much as digits as its factorization.

72424357 is an evil number, because the sum of its binary digits is even.

The product of its digits is 47040, while the sum is 34.

The square root of 72424357 is about 8510.2501138333. The cubic root of 72424357 is about 416.8324772255.

The spelling of 72424357 in words is "seventy-two million, four hundred twenty-four thousand, three hundred fifty-seven".