1243870969 has 4 divisors (see below), whose sum is σ = 1356950160. Its totient is φ = 1130791780.

The previous prime is 1243870963. The next prime is 1243871003. The reversal of 1243870969 is 9690783421.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1243870969 - 2⁹ = 1243870457 is a prime.

It is a super-2 number, since 2×1243870969² = 3094429975041997922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1243870963) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56539579 + ... + 56539600.

It is an arithmetic number, because the mean of its divisors is an integer number (339237540).

Almost surely, 2^1243870969 is an apocalyptic number.

It is an amenable number.

1243870969 is a deficient number, since it is larger than the sum of its proper divisors (113079191).

1243870969 is a wasteful number, since it uses less digits than its factorization.

1243870969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113079190.

The product of its (nonzero) digits is 653184, while the sum is 49.

The square root of 1243870969 is about 35268.5549604744. The cubic root of 1243870969 is about 1075.4538466577.

The spelling of 1243870969 in words is "one billion, two hundred forty-three million, eight hundred seventy thousand, nine hundred sixty-nine".