1987850969 has 8 divisors (see below), whose sum is σ = 2233839552. Its totient is φ = 1755159120.

The previous prime is 1987850959. The next prime is 1987850983. The reversal of 1987850969 is 9690587891.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1987850969 - 2¹⁶ = 1987785433 is a prime.

It is a super-2 number, since 2×1987850969² = 7903102949908477922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1987850959) 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, 3323867 + ... + 3324464.

It is an arithmetic number, because the mean of its divisors is an integer number (279229944).

Almost surely, 2^1987850969 is an apocalyptic number.

It is an amenable number.

1987850969 is a deficient number, since it is larger than the sum of its proper divisors (245988583).

1987850969 is a wasteful number, since it uses less digits than its factorization.

1987850969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6648367.

The product of its (nonzero) digits is 9797760, while the sum is 62.

The square root of 1987850969 is about 44585.3223494010. The cubic root of 1987850969 is about 1257.3647301028.

The spelling of 1987850969 in words is "one billion, nine hundred eighty-seven million, eight hundred fifty thousand, nine hundred sixty-nine".