72861707 has 2 divisors, whose sum is σ = 72861708. Its totient is φ = 72861706.

The previous prime is 72861673. The next prime is 72861709. The reversal of 72861707 is 70716827.

It is a strong prime.

It is an emirp because it is prime and its reverse (70716827) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72861707 - 2¹² = 72857611 is a prime.

Together with 72861709, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (72861709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36430853 + 36430854.

It is an arithmetic number, because the mean of its divisors is an integer number (36430854).

Almost surely, 2^72861707 is an apocalyptic number.

72861707 is a deficient number, since it is larger than the sum of its proper divisors (1).

72861707 is an equidigital number, since it uses as much as digits as its factorization.

72861707 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32928, while the sum is 38.

The square root of 72861707 is about 8535.9069231102. The cubic root of 72861707 is about 417.6698380328.

The spelling of 72861707 in words is "seventy-two million, eight hundred sixty-one thousand, seven hundred seven".