1381161719 has 16 divisors (see below), whose sum is σ = 1690113600. Its totient is φ = 1101686784.

The previous prime is 1381161697. The next prime is 1381161731. The reversal of 1381161719 is 9171611831.

It is a cyclic number.

It is not a de Polignac number, because 1381161719 - 2²⁰ = 1380113143 is a prime.

It is a super-2 number, since 2×1381161719² = 3815215388062069922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1381166719) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54614 + ... + 75795.

It is an arithmetic number, because the mean of its divisors is an integer number (105632100).

Almost surely, 2^1381161719 is an apocalyptic number.

1381161719 is a deficient number, since it is larger than the sum of its proper divisors (308951881).

1381161719 is a wasteful number, since it uses less digits than its factorization.

1381161719 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130522.

The product of its digits is 9072, while the sum is 38.

The square root of 1381161719 is about 37163.9841647797. The cubic root of 1381161719 is about 1113.6486054695.

The spelling of 1381161719 in words is "one billion, three hundred eighty-one million, one hundred sixty-one thousand, seven hundred nineteen".