1377423109 has 2 divisors, whose sum is σ = 1377423110. Its totient is φ = 1377423108.

The previous prime is 1377423101. The next prime is 1377423119. The reversal of 1377423109 is 9013247731.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1232220609 + 145202500 = 35103^2 + 12050^2 .

It is a cyclic number.

It is not a de Polignac number, because 1377423109 - 2³ = 1377423101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1377423101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 688711554 + 688711555.

It is an arithmetic number, because the mean of its divisors is an integer number (688711555).

Almost surely, 2^1377423109 is an apocalyptic number.

It is an amenable number.

1377423109 is a deficient number, since it is larger than the sum of its proper divisors (1).

1377423109 is an equidigital number, since it uses as much as digits as its factorization.

1377423109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31752, while the sum is 37.

The square root of 1377423109 is about 37113.6512485635. The cubic root of 1377423109 is about 1112.6428675504.

The spelling of 1377423109 in words is "one billion, three hundred seventy-seven million, four hundred twenty-three thousand, one hundred nine".