84309399 has 12 divisors (see below), whose sum is σ = 124371936. Its totient is φ = 55010112.

The previous prime is 84309377. The next prime is 84309431. The reversal of 84309399 is 99390348.

It is a de Polignac number, because none of the positive numbers 2^k-84309399 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84309319) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 99234 + ... + 100079.

It is an arithmetic number, because the mean of its divisors is an integer number (10364328).

Almost surely, 2^84309399 is an apocalyptic number.

84309399 is a deficient number, since it is larger than the sum of its proper divisors (40062537).

84309399 is a wasteful number, since it uses less digits than its factorization.

84309399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199366 (or 199363 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 45.

The square root of 84309399 is about 9182.0149749388. The cubic root of 84309399 is about 438.4889610450.

The spelling of 84309399 in words is "eighty-four million, three hundred nine thousand, three hundred ninety-nine".