84151091 has 2 divisors, whose sum is σ = 84151092. Its totient is φ = 84151090.

The previous prime is 84151087. The next prime is 84151157. The reversal of 84151091 is 19015148.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 84151091 - 2² = 84151087 is a prime.

It is a super-2 number, since 2×84151091² = 14162812232980562, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (84151021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42075545 + 42075546.

It is an arithmetic number, because the mean of its divisors is an integer number (42075546).

Almost surely, 2^84151091 is an apocalyptic number.

84151091 is a deficient number, since it is larger than the sum of its proper divisors (1).

84151091 is an equidigital number, since it uses as much as digits as its factorization.

84151091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 29.

The square root of 84151091 is about 9173.3903765184. The cubic root of 84151091 is about 438.2143384273.

The spelling of 84151091 in words is "eighty-four million, one hundred fifty-one thousand, ninety-one".