1100139973 has 2 divisors, whose sum is σ = 1100139974. Its totient is φ = 1100139972.

The previous prime is 1100139961. The next prime is 1100140007. The reversal of 1100139973 is 3799310011.

It is an a-pointer prime, because the next prime (1100140007) can be obtained adding 1100139973 to its sum of digits (34).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 741908644 + 358231329 = 27238^2 + 18927^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1100139973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1100139673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 550069986 + 550069987.

It is an arithmetic number, because the mean of its divisors is an integer number (550069987).

Almost surely, 2^1100139973 is an apocalyptic number.

It is an amenable number.

1100139973 is a deficient number, since it is larger than the sum of its proper divisors (1).

1100139973 is an equidigital number, since it uses as much as digits as its factorization.

1100139973 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5103, while the sum is 34.

The square root of 1100139973 is about 33168.3580088011. The cubic root of 1100139973 is about 1032.3238988552.

Adding to 1100139973 its reverse (3799310011), we get a palindrome (4899449984).

The spelling of 1100139973 in words is "one billion, one hundred million, one hundred thirty-nine thousand, nine hundred seventy-three".