1381149791 has 16 divisors (see below), whose sum is σ = 1595489280. Its totient is φ = 1171104480.

The previous prime is 1381149787. The next prime is 1381149827. The reversal of 1381149791 is 1979411831.

It is not a de Polignac number, because 1381149791 - 2² = 1381149787 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1381149491) 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, 694100 + ... + 696086.

It is an arithmetic number, because the mean of its divisors is an integer number (99718080).

Almost surely, 2^1381149791 is an apocalyptic number.

1381149791 is a deficient number, since it is larger than the sum of its proper divisors (214339489).

1381149791 is a wasteful number, since it uses less digits than its factorization.

1381149791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3014.

The product of its digits is 54432, while the sum is 44.

The square root of 1381149791 is about 37163.8236864831. The cubic root of 1381149791 is about 1113.6453995599.

The spelling of 1381149791 in words is "one billion, three hundred eighty-one million, one hundred forty-nine thousand, seven hundred ninety-one".