1487136909 has 4 divisors (see below), whose sum is σ = 1982849216. Its totient is φ = 991424604.

The previous prime is 1487136883. The next prime is 1487136923. The reversal of 1487136909 is 9096317841.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1487136909 - 2⁵ = 1487136877 is a prime.

It is a super-2 number, since 2×1487136909² = 4423152372220148562, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1487136709) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 247856149 + ... + 247856154.

It is an arithmetic number, because the mean of its divisors is an integer number (495712304).

Almost surely, 2^1487136909 is an apocalyptic number.

It is an amenable number.

1487136909 is a deficient number, since it is larger than the sum of its proper divisors (495712307).

1487136909 is an equidigital number, since it uses as much as digits as its factorization.

1487136909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 495712306.

The product of its (nonzero) digits is 326592, while the sum is 48.

The square root of 1487136909 is about 38563.4141253079. The cubic root of 1487136909 is about 1141.4327192670.

The spelling of 1487136909 in words is "one billion, four hundred eighty-seven million, one hundred thirty-six thousand, nine hundred nine".