83987146 has 4 divisors (see below), whose sum is σ = 125980722. Its totient is φ = 41993572.

The previous prime is 83987143. The next prime is 83987171. The reversal of 83987146 is 64178938.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 64178938 = 2 ⋅32089469.

It can be written as a sum of positive squares in only one way, i.e., 51051025 + 32936121 = 7145^2 + 5739^2 .

It is a junction number, because it is equal to n+sod(n) for n = 83987096 and 83987105.

It is not an unprimeable number, because it can be changed into a prime (83987143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20996785 + ... + 20996788.

Almost surely, 2^83987146 is an apocalyptic number.

83987146 is a deficient number, since it is larger than the sum of its proper divisors (41993576).

83987146 is a wasteful number, since it uses less digits than its factorization.

83987146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41993575.

The product of its digits is 290304, while the sum is 46.

The square root of 83987146 is about 9164.4501198926. The cubic root of 83987146 is about 437.9295738258.

The spelling of 83987146 in words is "eighty-three million, nine hundred eighty-seven thousand, one hundred forty-six".