1381970869 has 2 divisors, whose sum is σ = 1381970870. Its totient is φ = 1381970868.

The previous prime is 1381970809. The next prime is 1381970881. The reversal of 1381970869 is 9680791831.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 751308100 + 630662769 = 27410^2 + 25113^2 .

It is a cyclic number.

It is not a de Polignac number, because 1381970869 - 2⁷ = 1381970741 is a prime.

It is a super-2 number, since 2×1381970869² = 3819686965529230322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1381970809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 690985434 + 690985435.

It is an arithmetic number, because the mean of its divisors is an integer number (690985435).

Almost surely, 2^1381970869 is an apocalyptic number.

It is an amenable number.

1381970869 is a deficient number, since it is larger than the sum of its proper divisors (1).

1381970869 is an equidigital number, since it uses as much as digits as its factorization.

1381970869 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 653184, while the sum is 52.

The square root of 1381970869 is about 37174.8687825525. The cubic root of 1381970869 is about 1113.8660390601.

The spelling of 1381970869 in words is "one billion, three hundred eighty-one million, nine hundred seventy thousand, eight hundred sixty-nine".