84619091 has 2 divisors, whose sum is σ = 84619092. Its totient is φ = 84619090.

The previous prime is 84619079. The next prime is 84619097. The reversal of 84619091 is 19091648.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84619091 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (84619097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42309545 + 42309546.

It is an arithmetic number, because the mean of its divisors is an integer number (42309546).

Almost surely, 2^84619091 is an apocalyptic number.

84619091 is a deficient number, since it is larger than the sum of its proper divisors (1).

84619091 is an equidigital number, since it uses as much as digits as its factorization.

84619091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 38.

The square root of 84619091 is about 9198.8635711157. The cubic root of 84619091 is about 439.0252025181.

The spelling of 84619091 in words is "eighty-four million, six hundred nineteen thousand, ninety-one".