1387790203057 has 4 divisors (see below), whose sum is σ = 1393746384420. Its totient is φ = 1381834021696.

The previous prime is 1387790203043. The next prime is 1387790203133. The reversal of 1387790203057 is 7503020977831.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 416075311521 + 971714891536 = 645039^2 + 985756^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1387790203057 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1387790202995 and 1387790203013.

It is not an unprimeable number, because it can be changed into a prime (1387790203357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2978090332 + ... + 2978090797.

It is an arithmetic number, because the mean of its divisors is an integer number (348436596105).

Almost surely, 2^{1387790203057} is an apocalyptic number.

It is an amenable number.

1387790203057 is a deficient number, since it is larger than the sum of its proper divisors (5956181363).

1387790203057 is an equidigital number, since it uses as much as digits as its factorization.

1387790203057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5956181362.

The product of its (nonzero) digits is 2222640, while the sum is 52.

The spelling of 1387790203057 in words is "one trillion, three hundred eighty-seven billion, seven hundred ninety million, two hundred three thousand, fifty-seven".