1376111921 has 2 divisors, whose sum is σ = 1376111922. Its totient is φ = 1376111920.

The previous prime is 1376111851. The next prime is 1376111951. The reversal of 1376111921 is 1291116731.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1362421921 + 13690000 = 36911^2 + 3700^2 .

It is a cyclic number.

It is not a de Polignac number, because 1376111921 - 2¹⁴ = 1376095537 is a prime.

It is not a weakly prime, because it can be changed into another prime (1376111951) 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 as a sum of consecutive naturals, namely, 688055960 + 688055961.

It is an arithmetic number, because the mean of its divisors is an integer number (688055961).

Almost surely, 2^1376111921 is an apocalyptic number.

It is an amenable number.

1376111921 is a deficient number, since it is larger than the sum of its proper divisors (1).

1376111921 is an equidigital number, since it uses as much as digits as its factorization.

1376111921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2268, while the sum is 32.

The square root of 1376111921 is about 37095.9825452838. The cubic root of 1376111921 is about 1112.2897087855.

The spelling of 1376111921 in words is "one billion, three hundred seventy-six million, one hundred eleven thousand, nine hundred twenty-one".