1361388634 has 16 divisors (see below), whose sum is σ = 2082794472. Its totient is φ = 667150848.

The previous prime is 1361388629. The next prime is 1361388647. The reversal of 1361388634 is 4368831631.

It can be written as a sum of positive squares in 4 ways, for example, as 1314425025 + 46963609 = 36255^2 + 6853^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 103282 + ... + 115714.

Almost surely, 2^1361388634 is an apocalyptic number.

1361388634 is a deficient number, since it is larger than the sum of its proper divisors (721405838).

1361388634 is a wasteful number, since it uses less digits than its factorization.

1361388634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13521.

The product of its digits is 248832, while the sum is 43.

The square root of 1361388634 is about 36897.0003387809. Note that the first 3 decimals coincide. The cubic root of 1361388634 is about 1108.3086092487.

The spelling of 1361388634 in words is "one billion, three hundred sixty-one million, three hundred eighty-eight thousand, six hundred thirty-four".