72087469 has 2 divisors, whose sum is σ = 72087470. Its totient is φ = 72087468.

The previous prime is 72087467. The next prime is 72087481. The reversal of 72087469 is 96478027.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36542025 + 35545444 = 6045^2 + 5962^2 .

It is a cyclic number.

It is not a de Polignac number, because 72087469 - 2¹ = 72087467 is a prime.

It is a super-2 number, since 2×72087469² = 10393206373651922, which contains 22 as substring.

Together with 72087467, 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 (72087461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36043734 + 36043735.

It is an arithmetic number, because the mean of its divisors is an integer number (36043735).

Almost surely, 2^72087469 is an apocalyptic number.

It is an amenable number.

72087469 is a deficient number, since it is larger than the sum of its proper divisors (1).

72087469 is an equidigital number, since it uses as much as digits as its factorization.

72087469 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 169344, while the sum is 43.

The square root of 72087469 is about 8490.4339700630. The cubic root of 72087469 is about 416.1851620400.

The spelling of 72087469 in words is "seventy-two million, eighty-seven thousand, four hundred sixty-nine".