1987959 has 16 divisors (see below), whose sum is σ = 2829312. Its totient is φ = 1238688.

The previous prime is 1987939. The next prime is 1987969. The reversal of 1987959 is 9597891.

It is not a de Polignac number, because 1987959 - 2⁸ = 1987703 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1987919) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2937 + ... + 3549.

It is an arithmetic number, because the mean of its divisors is an integer number (176832).

2^1987959 is an apocalyptic number.

1987959 is a deficient number, since it is larger than the sum of its proper divisors (841353).

1987959 is a wasteful number, since it uses less digits than its factorization.

1987959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 686.

The product of its digits is 204120, while the sum is 48.

The square root of 1987959 is about 1409.9499991134. The cubic root of 1987959 is about 125.7387507114.

It can be divided in two parts, 19 and 87959, that added together give a palindrome (87978).

The spelling of 1987959 in words is "one million, nine hundred eighty-seven thousand, nine hundred fifty-nine".