72923287 has 2 divisors, whose sum is σ = 72923288. Its totient is φ = 72923286.

The previous prime is 72923261. The next prime is 72923309. The reversal of 72923287 is 78232927.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72923287 - 2¹¹ = 72921239 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72924287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36461643 + 36461644.

It is an arithmetic number, because the mean of its divisors is an integer number (36461644).

Almost surely, 2^72923287 is an apocalyptic number.

72923287 is a deficient number, since it is larger than the sum of its proper divisors (1).

72923287 is an equidigital number, since it uses as much as digits as its factorization.

72923287 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 84672, while the sum is 40.

The square root of 72923287 is about 8539.5132765281. The cubic root of 72923287 is about 417.7874712276.

The spelling of 72923287 in words is "seventy-two million, nine hundred twenty-three thousand, two hundred eighty-seven".