1293878949 has 16 divisors (see below), whose sum is σ = 1904684544. Its totient is φ = 774719600.

The previous prime is 1293878947. The next prime is 1293878951. The reversal of 1293878949 is 9498783921.

It is an interprime number because it is at equal distance from previous prime (1293878947) and next prime (1293878951).

It is a cyclic number.

It is not a de Polignac number, because 1293878949 - 2¹ = 1293878947 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1293878892 and 1293878901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1293878947) 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, 233457 + ... + 238934.

It is an arithmetic number, because the mean of its divisors is an integer number (119042784).

Almost surely, 2^1293878949 is an apocalyptic number.

It is an amenable number.

1293878949 is a deficient number, since it is larger than the sum of its proper divisors (610805595).

1293878949 is a wasteful number, since it uses less digits than its factorization.

1293878949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 472488.

The product of its digits is 7838208, while the sum is 60.

The square root of 1293878949 is about 35970.5288951942. The cubic root of 1293878949 is about 1089.6772461346.

The spelling of 1293878949 in words is "one billion, two hundred ninety-three million, eight hundred seventy-eight thousand, nine hundred forty-nine".