1487891031 has 16 divisors (see below), whose sum is σ = 2214537600. Its totient is φ = 880780320.

The previous prime is 1487891021. The next prime is 1487891047. The reversal of 1487891031 is 1301987841.

It is not a de Polignac number, because 1487891031 - 2⁷ = 1487890903 is a prime.

It is a super-2 number, since 2×1487891031² = 4427639440260485922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1487891021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 522856 + ... + 525693.

It is an arithmetic number, because the mean of its divisors is an integer number (138408600).

Almost surely, 2^1487891031 is an apocalyptic number.

1487891031 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1487891031 is a deficient number, since it is larger than the sum of its proper divisors (726646569).

1487891031 is a wasteful number, since it uses less digits than its factorization.

1487891031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1048606.

The product of its (nonzero) digits is 48384, while the sum is 42.

The square root of 1487891031 is about 38573.1905732466. The cubic root of 1487891031 is about 1141.6256255290.

The spelling of 1487891031 in words is "one billion, four hundred eighty-seven million, eight hundred ninety-one thousand, thirty-one".