1040139799 has 2 divisors, whose sum is σ = 1040139800. Its totient is φ = 1040139798.

The previous prime is 1040139773. The next prime is 1040139889. The reversal of 1040139799 is 9979310401.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (9979310401) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1040139799 - 2¹³ = 1040131607 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1040139719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 520069899 + 520069900.

It is an arithmetic number, because the mean of its divisors is an integer number (520069900).

Almost surely, 2^1040139799 is an apocalyptic number.

1040139799 is a deficient number, since it is larger than the sum of its proper divisors (1).

1040139799 is an equidigital number, since it uses as much as digits as its factorization.

1040139799 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 61236, while the sum is 43.

The square root of 1040139799 is about 32251.1984118420. The cubic root of 1040139799 is about 1013.2047987963.

The spelling of 1040139799 in words is "one billion, forty million, one hundred thirty-nine thousand, seven hundred ninety-nine".