987061823 has 4 divisors (see below), whose sum is σ = 1076794728. Its totient is φ = 897328920.

The previous prime is 987061807. The next prime is 987061843. The reversal of 987061823 is 328160789.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 987061823 - 2⁴ = 987061807 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (987061843) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44866436 + ... + 44866457.

It is an arithmetic number, because the mean of its divisors is an integer number (269198682).

Almost surely, 2^987061823 is an apocalyptic number.

987061823 is a deficient number, since it is larger than the sum of its proper divisors (89732905).

987061823 is a wasteful number, since it uses less digits than its factorization.

987061823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89732904.

The product of its (nonzero) digits is 145152, while the sum is 44.

The square root of 987061823 is about 31417.5400532887. The cubic root of 987061823 is about 995.6685398748.

The spelling of 987061823 in words is "nine hundred eighty-seven million, sixty-one thousand, eight hundred twenty-three".