1987160506 has 4 divisors (see below), whose sum is σ = 2980740762. Its totient is φ = 993580252.

The previous prime is 1987160503. The next prime is 1987160531. The reversal of 1987160506 is 6050617891.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 1888337025 + 98823481 = 43455^2 + 9941^2 .

It is not an unprimeable number, because it can be changed into a prime (1987160503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 496790125 + ... + 496790128.

Almost surely, 2^1987160506 is an apocalyptic number.

1987160506 is a deficient number, since it is larger than the sum of its proper divisors (993580256).

1987160506 is an equidigital number, since it uses as much as digits as its factorization.

1987160506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 993580255.

The product of its (nonzero) digits is 90720, while the sum is 43.

The square root of 1987160506 is about 44577.5785120726. The cubic root of 1987160506 is about 1257.2191349563.

The spelling of 1987160506 in words is "one billion, nine hundred eighty-seven million, one hundred sixty thousand, five hundred six".