987654 has 16 divisors (see below), whose sum is σ = 1996848. Its totient is φ = 325632.

The previous prime is 987631. The next prime is 987659. The reversal of 987654 is 456789.

987654 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

It is an alternating number because its digits alternate between odd and even.

It is a straight-line number, since its digits are in arithmetic progression.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (987659) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 267 + ... + 1430.

It is an arithmetic number, because the mean of its divisors is an integer number (124803).

2⁹⁸⁷⁶⁵⁴ is an apocalyptic number.

987654 is an abundant number, since it is smaller than the sum of its proper divisors (1009194).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

987654 is a wasteful number, since it uses less digits than its factorization.

987654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1799.

The product of its digits is 60480, while the sum is 39.

The square root of 987654 is about 993.8078285061. The cubic root of 987654 is about 99.5867613571.

The spelling of 987654 in words is "nine hundred eighty-seven thousand, six hundred fifty-four".