1238851969 has 4 divisors (see below), whose sum is σ = 1259849520. Its totient is φ = 1217854420.

The previous prime is 1238851963. The next prime is 1238851979. The reversal of 1238851969 is 9691588321.

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 1238851969 - 2⁵ = 1238851937 is a prime.

It is a super-2 number, since 2×1238851969² = 3069508402190353922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1238851963) 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, 10498687 + ... + 10498804.

It is an arithmetic number, because the mean of its divisors is an integer number (314962380).

Almost surely, 2^1238851969 is an apocalyptic number.

It is an amenable number.

1238851969 is a deficient number, since it is larger than the sum of its proper divisors (20997551).

1238851969 is an equidigital number, since it uses as much as digits as its factorization.

1238851969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20997550.

The product of its digits is 933120, while the sum is 52.

The square root of 1238851969 is about 35197.3290037753. The cubic root of 1238851969 is about 1074.0054169327.

The spelling of 1238851969 in words is "one billion, two hundred thirty-eight million, eight hundred fifty-one thousand, nine hundred sixty-nine".