83451987 has 12 divisors (see below), whose sum is σ = 120625960. Its totient is φ = 55595808.

The previous prime is 83451959. The next prime is 83451989. The reversal of 83451987 is 78915438.

It is not a de Polignac number, because 83451987 - 2⁶ = 83451923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83451989) 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, 17064 + ... + 21402.

Almost surely, 2^83451987 is an apocalyptic number.

83451987 is a deficient number, since it is larger than the sum of its proper divisors (37173973).

83451987 is a wasteful number, since it uses less digits than its factorization.

83451987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6482 (or 6479 counting only the distinct ones).

The product of its digits is 241920, while the sum is 45.

The square root of 83451987 is about 9135.2059090094. The cubic root of 83451987 is about 436.9974411055.

The spelling of 83451987 in words is "eighty-three million, four hundred fifty-one thousand, nine hundred eighty-seven".