1493409905 has 24 divisors (see below), whose sum is σ = 1953082872. Its totient is φ = 1095704064.

The previous prime is 1493409901. The next prime is 1493409977. The reversal of 1493409905 is 5099043941.

It is a happy number.

It can be written as a sum of positive squares in 12 ways, for example, as 719902561 + 773507344 = 26831^2 + 27812^2 .

It is not a de Polignac number, because 1493409905 - 2² = 1493409901 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1493409901) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 127037 + ... + 138293.

It is an arithmetic number, because the mean of its divisors is an integer number (81378453).

Almost surely, 2^1493409905 is an apocalyptic number.

It is an amenable number.

1493409905 is a deficient number, since it is larger than the sum of its proper divisors (459672967).

1493409905 is a wasteful number, since it uses less digits than its factorization.

1493409905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11445 (or 11432 counting only the distinct ones).

The product of its (nonzero) digits is 174960, while the sum is 44.

The square root of 1493409905 is about 38644.6620505342. The cubic root of 1493409905 is about 1143.0353869423.

The spelling of 1493409905 in words is "one billion, four hundred ninety-three million, four hundred nine thousand, nine hundred five".