72090247 has 2 divisors, whose sum is σ = 72090248. Its totient is φ = 72090246.

The previous prime is 72090241. The next prime is 72090253. The reversal of 72090247 is 74209027.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (72090241) and next prime (72090253).

It is an emirp because it is prime and its reverse (74209027) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72090247 - 2¹¹ = 72088199 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72090241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36045123 + 36045124.

It is an arithmetic number, because the mean of its divisors is an integer number (36045124).

Almost surely, 2^72090247 is an apocalyptic number.

72090247 is a deficient number, since it is larger than the sum of its proper divisors (1).

72090247 is an equidigital number, since it uses as much as digits as its factorization.

72090247 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 72090247 is about 8490.5975643649. The cubic root of 72090247 is about 416.1905080803.

The spelling of 72090247 in words is "seventy-two million, ninety thousand, two hundred forty-seven".