1493902439 has 4 divisors (see below), whose sum is σ = 1495543200. Its totient is φ = 1492261680.

The previous prime is 1493902391. The next prime is 1493902447. The reversal of 1493902439 is 9342093941.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9342093941 = 61 ⋅153149081.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1493902439 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 1493902439.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1493902939) 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, 819014 + ... + 820835.

It is an arithmetic number, because the mean of its divisors is an integer number (373885800).

Almost surely, 2^1493902439 is an apocalyptic number.

1493902439 is a deficient number, since it is larger than the sum of its proper divisors (1640761).

1493902439 is an equidigital number, since it uses as much as digits as its factorization.

1493902439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1640760.

The product of its (nonzero) digits is 209952, while the sum is 44.

The square root of 1493902439 is about 38651.0341258808. The cubic root of 1493902439 is about 1143.1610327120.

The spelling of 1493902439 in words is "one billion, four hundred ninety-three million, nine hundred two thousand, four hundred thirty-nine".