1011138659 has 4 divisors (see below), whose sum is σ = 1011207120. Its totient is φ = 1011070200.

The previous prime is 1011138643. The next prime is 1011138671. The reversal of 1011138659 is 9568311101.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1011138659 - 2⁴ = 1011138643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1011138629) 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, 1892 + ... + 45009.

It is an arithmetic number, because the mean of its divisors is an integer number (252801780).

Almost surely, 2^1011138659 is an apocalyptic number.

1011138659 is a deficient number, since it is larger than the sum of its proper divisors (68461).

1011138659 is an equidigital number, since it uses as much as digits as its factorization.

1011138659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68460.

The product of its (nonzero) digits is 6480, while the sum is 35.

The square root of 1011138659 is about 31798.4065481275. The cubic root of 1011138659 is about 1003.6991854869.

The spelling of 1011138659 in words is "one billion, eleven million, one hundred thirty-eight thousand, six hundred fifty-nine".