1381602409 has 8 divisors (see below), whose sum is σ = 1510892640. Its totient is φ = 1252927200.

The previous prime is 1381602407. The next prime is 1381602413. The reversal of 1381602409 is 9042061831.

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

It is a cyclic number.

It is not a de Polignac number, because 1381602409 - 2¹ = 1381602407 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1381602401) 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, 149047 + ... + 158044.

It is an arithmetic number, because the mean of its divisors is an integer number (188861580).

Almost surely, 2^1381602409 is an apocalyptic number.

It is an amenable number.

1381602409 is a deficient number, since it is larger than the sum of its proper divisors (129290231).

1381602409 is a wasteful number, since it uses less digits than its factorization.

1381602409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307511.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 1381602409 is about 37169.9126848584. The cubic root of 1381602409 is about 1113.7670375616.

The spelling of 1381602409 in words is "one billion, three hundred eighty-one million, six hundred two thousand, four hundred nine".