1987554158 has 4 divisors (see below), whose sum is σ = 2981331240. Its totient is φ = 993777078.

The previous prime is 1987554157. The next prime is 1987554169. The reversal of 1987554158 is 8514557891.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1987554157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 496888538 + ... + 496888541.

It is an arithmetic number, because the mean of its divisors is an integer number (745332810).

Almost surely, 2^1987554158 is an apocalyptic number.

1987554158 is a deficient number, since it is larger than the sum of its proper divisors (993777082).

1987554158 is an equidigital number, since it uses as much as digits as its factorization.

1987554158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 993777081.

The product of its digits is 2016000, while the sum is 53.

The square root of 1987554158 is about 44581.9936521462. The cubic root of 1987554158 is about 1257.3021468970.

The spelling of 1987554158 in words is "one billion, nine hundred eighty-seven million, five hundred fifty-four thousand, one hundred fifty-eight".