1377418121 has 2 divisors, whose sum is σ = 1377418122. Its totient is φ = 1377418120.

The previous prime is 1377418087. The next prime is 1377418151. The reversal of 1377418121 is 1218147731.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 800890000 + 576528121 = 28300^2 + 24011^2 .

It is a cyclic number.

It is not a de Polignac number, because 1377418121 - 2²⁶ = 1310309257 is a prime.

It is not a weakly prime, because it can be changed into another prime (1377418151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 688709060 + 688709061.

It is an arithmetic number, because the mean of its divisors is an integer number (688709061).

Almost surely, 2^1377418121 is an apocalyptic number.

It is an amenable number.

1377418121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1377418121 is an equidigital number, since it uses as much as digits as its factorization.

1377418121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9408, while the sum is 35.

The square root of 1377418121 is about 37113.5840495094. The cubic root of 1377418121 is about 1112.6415244943.

The spelling of 1377418121 in words is "one billion, three hundred seventy-seven million, four hundred eighteen thousand, one hundred twenty-one".