1493492391 has 16 divisors (see below), whose sum is σ = 2213713920. Its totient is φ = 995151960.

The previous prime is 1493492389. The next prime is 1493492401. The reversal of 1493492391 is 1932943941.

1493492391 is a `hidden beast` number, since 149 + 34 + 92 + 391 = 666.

It is not a de Polignac number, because 1493492391 - 2¹ = 1493492389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1493492591) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43896 + ... + 70098.

It is an arithmetic number, because the mean of its divisors is an integer number (138357120).

Almost surely, 2^1493492391 is an apocalyptic number.

1493492391 is a deficient number, since it is larger than the sum of its proper divisors (720221529).

1493492391 is a wasteful number, since it uses less digits than its factorization.

1493492391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28323 (or 28317 counting only the distinct ones).

The product of its digits is 209952, while the sum is 45.

The square root of 1493492391 is about 38645.7292724565. The cubic root of 1493492391 is about 1143.0564311045.

The spelling of 1493492391 in words is "one billion, four hundred ninety-three million, four hundred ninety-two thousand, three hundred ninety-one".