1497993987 has 16 divisors (see below), whose sum is σ = 2283426560. Its totient is φ = 855708192.

The previous prime is 1497993983. The next prime is 1497994013. The reversal of 1497993987 is 7893997941.

It is not a de Polignac number, because 1497993987 - 2² = 1497993983 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1497993983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62568 + ... + 83130.

It is an arithmetic number, because the mean of its divisors is an integer number (142714160).

Almost surely, 2^1497993987 is an apocalyptic number.

1497993987 is a deficient number, since it is larger than the sum of its proper divisors (785432573).

1497993987 is a wasteful number, since it uses less digits than its factorization.

1497993987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24042.

The product of its digits is 30862944, while the sum is 66.

The square root of 1497993987 is about 38703.9272813496. The cubic root of 1497993987 is about 1144.2037234279.

The spelling of 1497993987 in words is "one billion, four hundred ninety-seven million, nine hundred ninety-three thousand, nine hundred eighty-seven".