83429915 has 4 divisors (see below), whose sum is σ = 100115904. Its totient is φ = 66743928.

The previous prime is 83429911. The next prime is 83429917. The reversal of 83429915 is 51992438.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 83429915 - 2² = 83429911 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83429911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8342987 + ... + 8342996.

It is an arithmetic number, because the mean of its divisors is an integer number (25028976).

Almost surely, 2^83429915 is an apocalyptic number.

83429915 is a deficient number, since it is larger than the sum of its proper divisors (16685989).

83429915 is a wasteful number, since it uses less digits than its factorization.

83429915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16685988.

The product of its digits is 77760, while the sum is 41.

The square root of 83429915 is about 9133.9977556380. The cubic root of 83429915 is about 436.9589109344.

Adding to 83429915 its sum of digits (41), we get a square (83429956 = 9134²).

The spelling of 83429915 in words is "eighty-three million, four hundred twenty-nine thousand, nine hundred fifteen".