1139005945 has 32 divisors (see below), whose sum is σ = 1706132736. Its totient is φ = 709171200.

The previous prime is 1139005909. The next prime is 1139005949. The reversal of 1139005945 is 5495009311.

It is a happy number.

It is not a de Polignac number, because 1139005945 - 2¹⁵ = 1138973177 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1139005949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 498205 + ... + 500485.

It is an arithmetic number, because the mean of its divisors is an integer number (53316648).

Almost surely, 2^1139005945 is an apocalyptic number.

It is an amenable number.

1139005945 is a deficient number, since it is larger than the sum of its proper divisors (567126791).

1139005945 is a wasteful number, since it uses less digits than its factorization.

1139005945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3601.

The product of its (nonzero) digits is 24300, while the sum is 37.

The square root of 1139005945 is about 33749.1621377480. The cubic root of 1139005945 is about 1044.3402029933.

The spelling of 1139005945 in words is "one billion, one hundred thirty-nine million, five thousand, nine hundred forty-five".