1138958371 has 2 divisors, whose sum is σ = 1138958372. Its totient is φ = 1138958370.

The previous prime is 1138958369. The next prime is 1138958417. The reversal of 1138958371 is 1738598311.

1138958371 = T₂₇₅₅₄ + T₂₇₅₅₅ + T₂₇₅₅₆.

It is an a-pointer prime, because the next prime (1138958417) can be obtained adding 1138958371 to its sum of digits (46).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1138958371 - 2¹ = 1138958369 is a prime.

Together with 1138958369, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1138958341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 569479185 + 569479186.

It is an arithmetic number, because the mean of its divisors is an integer number (569479186).

Almost surely, 2^1138958371 is an apocalyptic number.

1138958371 is the 27556-th centered triangular number.

1138958371 is a deficient number, since it is larger than the sum of its proper divisors (1).

1138958371 is an equidigital number, since it uses as much as digits as its factorization.

1138958371 is an evil number, because the sum of its binary digits is even.

The product of its digits is 181440, while the sum is 46.

The square root of 1138958371 is about 33748.4573128906. The cubic root of 1138958371 is about 1044.3256627904.

The spelling of 1138958371 in words is "one billion, one hundred thirty-eight million, nine hundred fifty-eight thousand, three hundred seventy-one".