1294631393 has 12 divisors (see below), whose sum is σ = 1468932864. Its totient is φ = 1138968600.

The previous prime is 1294631357. The next prime is 1294631417. The reversal of 1294631393 is 3931364921.

It is not a de Polignac number, because 1294631393 - 2²⁶ = 1227522529 is a prime.

It is a super-2 number, since 2×1294631393² = 3352140887482240898, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1294631393.

It is not an unprimeable number, because it can be changed into a prime (1294631323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 168821 + ... + 176322.

It is an arithmetic number, because the mean of its divisors is an integer number (122411072).

Almost surely, 2^1294631393 is an apocalyptic number.

It is an amenable number.

1294631393 is a deficient number, since it is larger than the sum of its proper divisors (174301471).

1294631393 is a wasteful number, since it uses less digits than its factorization.

1294631393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345196 (or 345185 counting only the distinct ones).

The product of its digits is 104976, while the sum is 41.

The square root of 1294631393 is about 35980.9865484536. The cubic root of 1294631393 is about 1089.8884359625. Note that the first 3 decimals are identical.

The spelling of 1294631393 in words is "one billion, two hundred ninety-four million, six hundred thirty-one thousand, three hundred ninety-three".