1387194394 has 8 divisors (see below), whose sum is σ = 2088304308. Its totient is φ = 691092960.

The previous prime is 1387194329. The next prime is 1387194409. The reversal of 1387194394 is 4934917831.

It can be written as a sum of positive squares in 2 ways, for example, as 1384807369 + 2387025 = 37213^2 + 1545^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1251427 + ... + 1252534.

Almost surely, 2^1387194394 is an apocalyptic number.

1387194394 is a deficient number, since it is larger than the sum of its proper divisors (701109914).

1387194394 is a wasteful number, since it uses less digits than its factorization.

1387194394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2504240.

The product of its digits is 653184, while the sum is 49.

The square root of 1387194394 is about 37245.0586521219. The cubic root of 1387194394 is about 1115.2676585336.

The spelling of 1387194394 in words is "one billion, three hundred eighty-seven million, one hundred ninety-four thousand, three hundred ninety-four".