1377657553 has 2 divisors, whose sum is σ = 1377657554. Its totient is φ = 1377657552.

The previous prime is 1377657539. The next prime is 1377657563. The reversal of 1377657553 is 3557567731.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1305882769 + 71774784 = 36137^2 + 8472^2 .

It is an emirp because it is prime and its reverse (3557567731) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1377657553 - 2²⁵ = 1344103121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1377657497 and 1377657506.

It is not a weakly prime, because it can be changed into another prime (1377657563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 688828776 + 688828777.

It is an arithmetic number, because the mean of its divisors is an integer number (688828777).

Almost surely, 2^1377657553 is an apocalyptic number.

It is an amenable number.

1377657553 is a deficient number, since it is larger than the sum of its proper divisors (1).

1377657553 is an equidigital number, since it uses as much as digits as its factorization.

1377657553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2315250, while the sum is 49.

The square root of 1377657553 is about 37116.8095746388. The cubic root of 1377657553 is about 1112.7059896815.

The spelling of 1377657553 in words is "one billion, three hundred seventy-seven million, six hundred fifty-seven thousand, five hundred fifty-three".