1539989487 has 24 divisors (see below), whose sum is σ = 2283522384. Its totient is φ = 999540864.

The previous prime is 1539989483. The next prime is 1539989491. The reversal of 1539989487 is 7849899351.

1539989487 is a `hidden beast` number, since 1 + 539 + 9 + 8 + 94 + 8 + 7 = 666.

It is an interprime number because it is at equal distance from previous prime (1539989483) and next prime (1539989491).

It is not a de Polignac number, because 1539989487 - 2² = 1539989483 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1539989483) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 116403 + ... + 128955.

It is an arithmetic number, because the mean of its divisors is an integer number (95146766).

Almost surely, 2^1539989487 is an apocalyptic number.

1539989487 is a deficient number, since it is larger than the sum of its proper divisors (743532897).

1539989487 is a wasteful number, since it uses less digits than its factorization.

1539989487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12919 (or 12916 counting only the distinct ones).

The product of its digits is 19595520, while the sum is 63.

The square root of 1539989487 is about 39242.6997924455. The cubic root of 1539989487 is about 1154.7977224899.

The spelling of 1539989487 in words is "one billion, five hundred thirty-nine million, nine hundred eighty-nine thousand, four hundred eighty-seven".