1138401797 has 8 divisors (see below), whose sum is σ = 1238611416. Its totient is φ = 1039997952.

The previous prime is 1138401791. The next prime is 1138401827. The reversal of 1138401797 is 7971048311.

It can be written as a sum of positive squares in 4 ways, for example, as 2307361 + 1136094436 = 1519^2 + 33706^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1138401797 - 2⁸ = 1138401541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1138401791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 450128 + ... + 452649.

It is an arithmetic number, because the mean of its divisors is an integer number (154826427).

Almost surely, 2^1138401797 is an apocalyptic number.

It is an amenable number.

1138401797 is a deficient number, since it is larger than the sum of its proper divisors (100209619).

1138401797 is an equidigital number, since it uses as much as digits as its factorization.

1138401797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 902887.

The product of its (nonzero) digits is 42336, while the sum is 41.

The square root of 1138401797 is about 33740.2103876072. The cubic root of 1138401797 is about 1044.1555251071.

The spelling of 1138401797 in words is "one billion, one hundred thirty-eight million, four hundred one thousand, seven hundred ninety-seven".