83334991 has 2 divisors, whose sum is σ = 83334992. Its totient is φ = 83334990.

The previous prime is 83334973. The next prime is 83335033. The reversal of 83334991 is 19943338.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-83334991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83334791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41667495 + 41667496.

It is an arithmetic number, because the mean of its divisors is an integer number (41667496).

Almost surely, 2^83334991 is an apocalyptic number.

83334991 is a deficient number, since it is larger than the sum of its proper divisors (1).

83334991 is an equidigital number, since it uses as much as digits as its factorization.

83334991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69984, while the sum is 40.

The square root of 83334991 is about 9128.8000854439. The cubic root of 83334991 is about 436.7931285594.

The spelling of 83334991 in words is "eighty-three million, three hundred thirty-four thousand, nine hundred ninety-one".