84495991 has 2 divisors, whose sum is σ = 84495992. Its totient is φ = 84495990.

The previous prime is 84495973. The next prime is 84496003. The reversal of 84495991 is 19959448.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 84495991 - 2⁹ = 84495479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84495941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42247995 + 42247996.

It is an arithmetic number, because the mean of its divisors is an integer number (42247996).

Almost surely, 2^84495991 is an apocalyptic number.

84495991 is a deficient number, since it is larger than the sum of its proper divisors (1).

84495991 is an equidigital number, since it uses as much as digits as its factorization.

84495991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 466560, while the sum is 49.

The square root of 84495991 is about 9192.1700919859. The cubic root of 84495991 is about 438.8122079093.

The spelling of 84495991 in words is "eighty-four million, four hundred ninety-five thousand, nine hundred ninety-one".