1340690139 has 36 divisors (see below), whose sum is σ = 2011222200. Its totient is φ = 860569920.

The previous prime is 1340690137. The next prime is 1340690177. The reversal of 1340690139 is 9310960431.

It is not a de Polignac number, because 1340690139 - 2¹ = 1340690137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1340690137) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 3277767 + ... + 3278175.

Almost surely, 2^1340690139 is an apocalyptic number.

1340690139 is a deficient number, since it is larger than the sum of its proper divisors (670532061).

1340690139 is a wasteful number, since it uses less digits than its factorization.

1340690139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 856 (or 822 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 36.

The square root of 1340690139 is about 36615.4358024044. The cubic root of 1340690139 is about 1102.6630076591.

The spelling of 1340690139 in words is "one billion, three hundred forty million, six hundred ninety thousand, one hundred thirty-nine".