83987390 has 8 divisors (see below), whose sum is σ = 151177320. Its totient is φ = 33594952.

The previous prime is 83987389. The next prime is 83987399. The reversal of 83987390 is 9378938.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83987399) 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, 4199360 + ... + 4199379.

It is an arithmetic number, because the mean of its divisors is an integer number (18897165).

Almost surely, 2^83987390 is an apocalyptic number.

83987390 is a deficient number, since it is larger than the sum of its proper divisors (67189930).

83987390 is a wasteful number, since it uses less digits than its factorization.

83987390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8398746.

The product of its (nonzero) digits is 326592, while the sum is 47.

The square root of 83987390 is about 9164.4634321929. The cubic root of 83987390 is about 437.9299979173.

The spelling of 83987390 in words is "eighty-three million, nine hundred eighty-seven thousand, three hundred ninety".