1987167015 has 12 divisors (see below), whose sum is σ = 3444422904. Its totient is φ = 1059822384.

The previous prime is 1987167011. The next prime is 1987167031. The reversal of 1987167015 is 5107617891.

It is not a de Polignac number, because 1987167015 - 2² = 1987167011 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 44159267 = 1987167015 / (1 + 9 + 8 + 7 + 1 + 6 + 7 + 0 + 1 + 5).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1987167011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22079589 + ... + 22079678.

It is an arithmetic number, because the mean of its divisors is an integer number (287035242).

Almost surely, 2^1987167015 is an apocalyptic number.

1987167015 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1987167015 is a deficient number, since it is larger than the sum of its proper divisors (1457255889).

1987167015 is a wasteful number, since it uses less digits than its factorization.

1987167015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44159278 (or 44159275 counting only the distinct ones).

The product of its (nonzero) digits is 105840, while the sum is 45.

The square root of 1987167015 is about 44577.6515195675. The cubic root of 1987167015 is about 1257.2205076403.

The spelling of 1987167015 in words is "one billion, nine hundred eighty-seven million, one hundred sixty-seven thousand, fifteen".