1243040979 has 8 divisors (see below), whose sum is σ = 1658031760. Its totient is φ = 828372096.

The previous prime is 1243040941. The next prime is 1243040983. The reversal of 1243040979 is 9790403421.

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

It is not a de Polignac number, because 1243040979 - 2¹⁵ = 1243008211 is a prime.

It is a super-3 number, since 3×1243040979³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1243040179) 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, 71314 + ... + 87015.

It is an arithmetic number, because the mean of its divisors is an integer number (207253970).

Almost surely, 2^1243040979 is an apocalyptic number.

1243040979 is a deficient number, since it is larger than the sum of its proper divisors (414990781).

1243040979 is a wasteful number, since it uses less digits than its factorization.

1243040979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160949.

The product of its (nonzero) digits is 54432, while the sum is 39.

The square root of 1243040979 is about 35256.7862829271. The cubic root of 1243040979 is about 1075.2145896472.

The spelling of 1243040979 in words is "one billion, two hundred forty-three million, forty thousand, nine hundred seventy-nine".