72269389 has 2 divisors, whose sum is σ = 72269390. Its totient is φ = 72269388.

The previous prime is 72269387. The next prime is 72269411. The reversal of 72269389 is 98396227.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45333289 + 26936100 = 6733^2 + 5190^2 .

It is an emirp because it is prime and its reverse (98396227) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72269389 - 2¹ = 72269387 is a prime.

Together with 72269387, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72269383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36134694 + 36134695.

It is an arithmetic number, because the mean of its divisors is an integer number (36134695).

Almost surely, 2^72269389 is an apocalyptic number.

It is an amenable number.

72269389 is a deficient number, since it is larger than the sum of its proper divisors (1).

72269389 is an equidigital number, since it uses as much as digits as its factorization.

72269389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 326592, while the sum is 46.

The square root of 72269389 is about 8501.1404529040. The cubic root of 72269389 is about 416.5349630321.

The spelling of 72269389 in words is "seventy-two million, two hundred sixty-nine thousand, three hundred eighty-nine".