1381381922 has 18 divisors (see below), whose sum is σ = 2127162387. Its totient is φ = 672793600.

The previous prime is 1381381901. The next prime is 1381381943. The reversal of 1381381922 is 2291831831.

It is an interprime number because it is at equal distance from previous prime (1381381901) and next prime (1381381943).

It can be written as a sum of positive squares in 5 ways, for example, as 558896881 + 822485041 = 23641^2 + 28679^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=26281.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2154722 + ... + 2155362.

Almost surely, 2^1381381922 is an apocalyptic number.

1381381922 is a deficient number, since it is larger than the sum of its proper divisors (745780465).

1381381922 is an frugal number, since it uses more digits than its factorization.

1381381922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1366 (or 684 counting only the distinct ones).

The product of its digits is 20736, while the sum is 38.

The square root of 1381381922 is about 37166.9466327273. The cubic root of 1381381922 is about 1113.7077865026.

The spelling of 1381381922 in words is "one billion, three hundred eighty-one million, three hundred eighty-one thousand, nine hundred twenty-two".