1339769845 has 4 divisors (see below), whose sum is σ = 1607723820. Its totient is φ = 1071815872.

The previous prime is 1339769839. The next prime is 1339769867. The reversal of 1339769845 is 5489679331.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 623351089 + 716418756 = 24967^2 + 26766^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1339769845 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 133976980 + ... + 133976989.

It is an arithmetic number, because the mean of its divisors is an integer number (401930955).

Almost surely, 2^1339769845 is an apocalyptic number.

It is an amenable number.

1339769845 is a deficient number, since it is larger than the sum of its proper divisors (267953975).

1339769845 is an equidigital number, since it uses as much as digits as its factorization.

1339769845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267953974.

The product of its digits is 4898880, while the sum is 55.

The square root of 1339769845 is about 36602.8666227114. The cubic root of 1339769845 is about 1102.4106484698.

The spelling of 1339769845 in words is "one billion, three hundred thirty-nine million, seven hundred sixty-nine thousand, eight hundred forty-five".