72005287 has 2 divisors, whose sum is σ = 72005288. Its totient is φ = 72005286.

The previous prime is 72005279. The next prime is 72005299. The reversal of 72005287 is 78250027.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72005287 - 2³ = 72005279 is a prime.

It is a super-2 number, since 2×72005287² = 10369522711904738, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72005207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36002643 + 36002644.

It is an arithmetic number, because the mean of its divisors is an integer number (36002644).

Almost surely, 2^72005287 is an apocalyptic number.

72005287 is a deficient number, since it is larger than the sum of its proper divisors (1).

72005287 is an equidigital number, since it uses as much as digits as its factorization.

72005287 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7840, while the sum is 31.

The square root of 72005287 is about 8485.5929079823. The cubic root of 72005287 is about 416.0269471419.

The spelling of 72005287 in words is "seventy-two million, five thousand, two hundred eighty-seven".