1662894139 has 4 divisors (see below), whose sum is σ = 1671335424. Its totient is φ = 1654452856.

The previous prime is 1662894131. The next prime is 1662894143. The reversal of 1662894139 is 9314982661.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1662894139 - 2³ = 1662894131 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1662894092 and 1662894101.

It is not an unprimeable number, because it can be changed into a prime (1662894131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4220347 + ... + 4220740.

It is an arithmetic number, because the mean of its divisors is an integer number (417833856).

Almost surely, 2^1662894139 is an apocalyptic number.

1662894139 is a deficient number, since it is larger than the sum of its proper divisors (8441285).

1662894139 is an equidigital number, since it uses as much as digits as its factorization.

1662894139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8441284.

The product of its digits is 559872, while the sum is 49.

The square root of 1662894139 is about 40778.5990318451. The cubic root of 1662894139 is about 1184.7358604657.

The spelling of 1662894139 in words is "one billion, six hundred sixty-two million, eight hundred ninety-four thousand, one hundred thirty-nine".