1377889257 has 8 divisors (see below), whose sum is σ = 1842391584. Its totient is φ = 915989888.

The previous prime is 1377889243. The next prime is 1377889259. The reversal of 1377889257 is 7529887731.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1377889257 - 2⁶ = 1377889193 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1377889197 and 1377889206.

It is not an unprimeable number, because it can be changed into a prime (1377889259) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 649503 + ... + 651620.

It is an arithmetic number, because the mean of its divisors is an integer number (230298948).

Almost surely, 2^1377889257 is an apocalyptic number.

It is an amenable number.

1377889257 is a deficient number, since it is larger than the sum of its proper divisors (464502327).

1377889257 is a wasteful number, since it uses less digits than its factorization.

1377889257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1301479.

The product of its digits is 5927040, while the sum is 57.

The square root of 1377889257 is about 37119.9307246121. The cubic root of 1377889257 is about 1112.7683670543.

The spelling of 1377889257 in words is "one billion, three hundred seventy-seven million, eight hundred eighty-nine thousand, two hundred fifty-seven".