1987062749 has 12 divisors (see below), whose sum is σ = 2322448128. Its totient is φ = 1695115800.

The previous prime is 1987062743. The next prime is 1987062787. The reversal of 1987062749 is 9472607891.

It is not a de Polignac number, because 1987062749 - 2⁴ = 1987062733 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1987062749.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1987062743) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 85757 + ... + 106434.

It is an arithmetic number, because the mean of its divisors is an integer number (193537344).

Almost surely, 2^1987062749 is an apocalyptic number.

It is an amenable number.

1987062749 is a deficient number, since it is larger than the sum of its proper divisors (335385379).

1987062749 is a wasteful number, since it uses less digits than its factorization.

1987062749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192416 (or 192409 counting only the distinct ones).

The product of its (nonzero) digits is 1524096, while the sum is 53.

The square root of 1987062749 is about 44576.4820168662. The cubic root of 1987062749 is about 1257.1985186068.

The spelling of 1987062749 in words is "one billion, nine hundred eighty-seven million, sixty-two thousand, seven hundred forty-nine".