1377155623 has 2 divisors, whose sum is σ = 1377155624. Its totient is φ = 1377155622.

The previous prime is 1377155609. The next prime is 1377155627. The reversal of 1377155623 is 3265517731.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1377155623 - 2⁹ = 1377155111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1377155627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 688577811 + 688577812.

It is an arithmetic number, because the mean of its divisors is an integer number (688577812).

Almost surely, 2^1377155623 is an apocalyptic number.

1377155623 is a deficient number, since it is larger than the sum of its proper divisors (1).

1377155623 is an equidigital number, since it uses as much as digits as its factorization.

1377155623 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 132300, while the sum is 40.

The square root of 1377155623 is about 37110.0474669597. The cubic root of 1377155623 is about 1112.5708403823.

The spelling of 1377155623 in words is "one billion, three hundred seventy-seven million, one hundred fifty-five thousand, six hundred twenty-three".