83406987 has 12 divisors (see below), whose sum is σ = 124631520. Its totient is φ = 53687088.

The previous prime is 83406959. The next prime is 83407003. The reversal of 83406987 is 78960438.

It is a happy number.

It is not a de Polignac number, because 83406987 - 2⁷ = 83406859 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (83406907) 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 11 ways as a sum of consecutive naturals, for example, 159523 + ... + 160044.

It is an arithmetic number, because the mean of its divisors is an integer number (10385960).

Almost surely, 2^83406987 is an apocalyptic number.

83406987 is a gapful number since it is divisible by the number (87) formed by its first and last digit.

83406987 is a deficient number, since it is larger than the sum of its proper divisors (41224533).

83406987 is a wasteful number, since it uses less digits than its factorization.

83406987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319602 (or 319599 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 83406987 is about 9132.7425782182. The cubic root of 83406987 is about 436.9188792830.

The spelling of 83406987 in words is "eighty-three million, four hundred six thousand, nine hundred eighty-seven".