1138899557 has 2 divisors, whose sum is σ = 1138899558. Its totient is φ = 1138899556.

The previous prime is 1138899521. The next prime is 1138899583. The reversal of 1138899557 is 7559988311.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1020546916 + 118352641 = 31946^2 + 10879^2 .

It is a cyclic number.

It is not a de Polignac number, because 1138899557 - 2¹⁴ = 1138883173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1138899757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 569449778 + 569449779.

It is an arithmetic number, because the mean of its divisors is an integer number (569449779).

Almost surely, 2^1138899557 is an apocalyptic number.

It is an amenable number.

1138899557 is a deficient number, since it is larger than the sum of its proper divisors (1).

1138899557 is an equidigital number, since it uses as much as digits as its factorization.

1138899557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2721600, while the sum is 56.

The square root of 1138899557 is about 33747.5859432938. The cubic root of 1138899557 is about 1044.3076867085.

The spelling of 1138899557 in words is "one billion, one hundred thirty-eight million, eight hundred ninety-nine thousand, five hundred fifty-seven".