1377261047 has 2 divisors, whose sum is σ = 1377261048. Its totient is φ = 1377261046.

The previous prime is 1377261031. The next prime is 1377261049. The reversal of 1377261047 is 7401627731.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1377261047 - 2⁴ = 1377261031 is a prime.

Together with 1377261049, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1377261047.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1377261049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 688630523 + 688630524.

It is an arithmetic number, because the mean of its divisors is an integer number (688630524).

Almost surely, 2^1377261047 is an apocalyptic number.

1377261047 is a deficient number, since it is larger than the sum of its proper divisors (1).

1377261047 is an equidigital number, since it uses as much as digits as its factorization.

1377261047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 49392, while the sum is 38.

The square root of 1377261047 is about 37111.4678637210. The cubic root of 1377261047 is about 1112.5992294943.

Adding to 1377261047 its reverse (7401627731), we get a palindrome (8778888778).

The spelling of 1377261047 in words is "one billion, three hundred seventy-seven million, two hundred sixty-one thousand, forty-seven".