1987479902 has 8 divisors (see below), whose sum is σ = 2985256200. Its totient is φ = 992394504.

The previous prime is 1987479889. The next prime is 1987479931. The reversal of 1987479902 is 2099747891.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 670877 + ... + 673832.

It is an arithmetic number, because the mean of its divisors is an integer number (373157025).

Almost surely, 2^1987479902 is an apocalyptic number.

1987479902 is a deficient number, since it is larger than the sum of its proper divisors (997776298).

1987479902 is a wasteful number, since it uses less digits than its factorization.

1987479902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1345450.

The product of its (nonzero) digits is 2286144, while the sum is 56.

The square root of 1987479902 is about 44581.1608417726. The cubic root of 1987479902 is about 1257.2864888933.

The spelling of 1987479902 in words is "one billion, nine hundred eighty-seven million, four hundred seventy-nine thousand, nine hundred two".