72245687 has 2 divisors, whose sum is σ = 72245688. Its totient is φ = 72245686.

The previous prime is 72245669. The next prime is 72245689. The reversal of 72245687 is 78654227.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72245687 - 2⁶ = 72245623 is a prime.

Together with 72245689, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72245689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36122843 + 36122844.

It is an arithmetic number, because the mean of its divisors is an integer number (36122844).

Almost surely, 2^72245687 is an apocalyptic number.

72245687 is a deficient number, since it is larger than the sum of its proper divisors (1).

72245687 is an equidigital number, since it uses as much as digits as its factorization.

72245687 is an evil number, because the sum of its binary digits is even.

The product of its digits is 188160, while the sum is 41.

The square root of 72245687 is about 8499.7462903313. The cubic root of 72245687 is about 416.4894214304.

The spelling of 72245687 in words is "seventy-two million, two hundred forty-five thousand, six hundred eighty-seven".