1293378871 has 4 divisors (see below), whose sum is σ = 1305466632. Its totient is φ = 1281291112.

The previous prime is 1293378833. The next prime is 1293378923. The reversal of 1293378871 is 1788733921.

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 1293378871 - 2²³ = 1284990263 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1293375871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6043720 + ... + 6043933.

It is an arithmetic number, because the mean of its divisors is an integer number (326366658).

Almost surely, 2^1293378871 is an apocalyptic number.

1293378871 is a deficient number, since it is larger than the sum of its proper divisors (12087761).

1293378871 is a wasteful number, since it uses less digits than its factorization.

1293378871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12087760.

The product of its digits is 508032, while the sum is 49.

The square root of 1293378871 is about 35963.5770050756. The cubic root of 1293378871 is about 1089.5368430372.

The spelling of 1293378871 in words is "one billion, two hundred ninety-three million, three hundred seventy-eight thousand, eight hundred seventy-one".