1987541619 has 32 divisors (see below), whose sum is σ = 3164396544. Its totient is φ = 1084955520.

The previous prime is 1987541597. The next prime is 1987541623. The reversal of 1987541619 is 9161457891.

It is not a de Polignac number, because 1987541619 - 2⁸ = 1987541363 is a prime.

It is a super-2 number, since 2×1987541619² = 7900643374514282322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1987541629) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 452317 + ... + 456689.

It is an arithmetic number, because the mean of its divisors is an integer number (98887392).

Almost surely, 2^1987541619 is an apocalyptic number.

1987541619 is a deficient number, since it is larger than the sum of its proper divisors (1176854925).

1987541619 is a wasteful number, since it uses less digits than its factorization.

1987541619 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5347.

The product of its digits is 544320, while the sum is 51.

The square root of 1987541619 is about 44581.8530233996. The cubic root of 1987541619 is about 1257.2995028861.

The spelling of 1987541619 in words is "one billion, nine hundred eighty-seven million, five hundred forty-one thousand, six hundred nineteen".