1387184961 has 8 divisors (see below), whose sum is σ = 1861361344. Its totient is φ = 918899280.

The previous prime is 1387184879. The next prime is 1387184963. The reversal of 1387184961 is 1694817831.

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

It is not a de Polignac number, because 1387184961 - 2¹⁰ = 1387183937 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1387184961.

It is not an unprimeable number, because it can be changed into a prime (1387184963) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1472125 + ... + 1473066.

It is an arithmetic number, because the mean of its divisors is an integer number (232670168).

Almost surely, 2^1387184961 is an apocalyptic number.

It is an amenable number.

1387184961 is a deficient number, since it is larger than the sum of its proper divisors (474176383).

1387184961 is a wasteful number, since it uses less digits than its factorization.

1387184961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2945351.

The product of its digits is 290304, while the sum is 48.

The square root of 1387184961 is about 37244.9320176585. The cubic root of 1387184961 is about 1115.2651305669.

The spelling of 1387184961 in words is "one billion, three hundred eighty-seven million, one hundred eighty-four thousand, nine hundred sixty-one".