73215091 has 2 divisors, whose sum is σ = 73215092. Its totient is φ = 73215090.

The previous prime is 73215061. The next prime is 73215097. The reversal of 73215091 is 19051237.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 73215091 - 2¹¹ = 73213043 is a prime.

It is not a weakly prime, because it can be changed into another prime (73215097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36607545 + 36607546.

It is an arithmetic number, because the mean of its divisors is an integer number (36607546).

Almost surely, 2^73215091 is an apocalyptic number.

73215091 is a deficient number, since it is larger than the sum of its proper divisors (1).

73215091 is an equidigital number, since it uses as much as digits as its factorization.

73215091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1890, while the sum is 28.

The square root of 73215091 is about 8556.5817357167. The cubic root of 73215091 is about 418.3439912348.

The spelling of 73215091 in words is "seventy-three million, two hundred fifteen thousand, ninety-one".