1339905087 has 24 divisors (see below), whose sum is σ = 2007457920. Its totient is φ = 860500800.

The previous prime is 1339905053. The next prime is 1339905131. The reversal of 1339905087 is 7805099331.

It is a happy number.

1339905087 is a `hidden beast` number, since 133 + 9 + 9 + 0 + 508 + 7 = 666.

It is not a de Polignac number, because 1339905087 - 2¹⁰ = 1339904063 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1339900087) 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, 13714 + ... + 53552.

It is an arithmetic number, because the mean of its divisors is an integer number (83644080).

Almost surely, 2^1339905087 is an apocalyptic number.

1339905087 is a deficient number, since it is larger than the sum of its proper divisors (667552833).

1339905087 is a wasteful number, since it uses less digits than its factorization.

1339905087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39983 (or 39980 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 45.

The square root of 1339905087 is about 36604.7139997023. The cubic root of 1339905087 is about 1102.4477412100.

The spelling of 1339905087 in words is "one billion, three hundred thirty-nine million, nine hundred five thousand, eighty-seven".