1987948037 has 4 divisors (see below), whose sum is σ = 1988683500. Its totient is φ = 1987212576.

The previous prime is 1987948003. The next prime is 1987948087. The reversal of 1987948037 is 7308497891.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1032272641 + 955675396 = 32129^2 + 30914^2 .

It is a cyclic number.

It is not a de Polignac number, because 1987948037 - 2²⁴ = 1971170821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1987948087) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 363662 + ... + 369087.

It is an arithmetic number, because the mean of its divisors is an integer number (497170875).

Almost surely, 2^1987948037 is an apocalyptic number.

It is an amenable number.

1987948037 is a deficient number, since it is larger than the sum of its proper divisors (735463).

1987948037 is an equidigital number, since it uses as much as digits as its factorization.

1987948037 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 735462.

The product of its (nonzero) digits is 3048192, while the sum is 56.

The square root of 1987948037 is about 44586.4109006320. The cubic root of 1987948037 is about 1257.3851957372.

The spelling of 1987948037 in words is "one billion, nine hundred eighty-seven million, nine hundred forty-eight thousand, thirty-seven".