16291091 has 2 divisors, whose sum is σ = 16291092. Its totient is φ = 16291090.

The previous prime is 16291057. The next prime is 16291123. The reversal of 16291091 is 19019261.

16291091 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16291091 - 2¹⁴ = 16274707 is a prime.

It is not a weakly prime, because it can be changed into another prime (16293091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8145545 + 8145546.

It is an arithmetic number, because the mean of its divisors is an integer number (8145546).

Almost surely, 2^16291091 is an apocalyptic number.

16291091 is a deficient number, since it is larger than the sum of its proper divisors (1).

16291091 is an equidigital number, since it uses as much as digits as its factorization.

16291091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972, while the sum is 29.

The square root of 16291091 is about 4036.2223675115. Note that the first 3 decimals coincide. The cubic root of 16291091 is about 253.5031673202.

The spelling of 16291091 in words is "sixteen million, two hundred ninety-one thousand, ninety-one".