1293840823 has 8 divisors (see below), whose sum is σ = 1438094736. Its totient is φ = 1154025600.

The previous prime is 1293840797. The next prime is 1293840833. The reversal of 1293840823 is 3280483921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1293840823 - 2⁹ = 1293840311 is a prime.

It is a super-2 number, since 2×1293840823² = 3348048150522634658, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1293840833) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1109058 + ... + 1110223.

It is an arithmetic number, because the mean of its divisors is an integer number (179761842).

Almost surely, 2^1293840823 is an apocalyptic number.

1293840823 is a deficient number, since it is larger than the sum of its proper divisors (144253913).

1293840823 is a wasteful number, since it uses less digits than its factorization.

1293840823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2219345.

The product of its (nonzero) digits is 82944, while the sum is 40.

The square root of 1293840823 is about 35969.9989296636. The cubic root of 1293840823 is about 1089.6665430615. Note that the first 3 decimals are identical.

The spelling of 1293840823 in words is "one billion, two hundred ninety-three million, eight hundred forty thousand, eight hundred twenty-three".