72922891 has 2 divisors, whose sum is σ = 72922892. Its totient is φ = 72922890.

The previous prime is 72922873. The next prime is 72922901. The reversal of 72922891 is 19822927.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72922891 - 2¹¹ = 72920843 is a prime.

It is equal to p_4279792 and since 72922891 and 4279792 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (72922841) 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, 36461445 + 36461446.

It is an arithmetic number, because the mean of its divisors is an integer number (36461446).

Almost surely, 2^72922891 is an apocalyptic number.

72922891 is a deficient number, since it is larger than the sum of its proper divisors (1).

72922891 is an equidigital number, since it uses as much as digits as its factorization.

72922891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 40.

The square root of 72922891 is about 8539.4900901635. The cubic root of 72922891 is about 417.7867149802.

The spelling of 72922891 in words is "seventy-two million, nine hundred twenty-two thousand, eight hundred ninety-one".