1239854853 has 4 divisors (see below), whose sum is σ = 1653139808. Its totient is φ = 826569900.

The previous prime is 1239854831. The next prime is 1239854857. The reversal of 1239854853 is 3584589321.

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, and also an emirpimes, since its reverse is a distinct semiprime: 3584589321 = 3 ⋅1194863107.

It is not a de Polignac number, because 1239854853 - 2⁶ = 1239854789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1239854857) 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, 206642473 + ... + 206642478.

It is an arithmetic number, because the mean of its divisors is an integer number (413284952).

Almost surely, 2^1239854853 is an apocalyptic number.

It is an amenable number.

1239854853 is a deficient number, since it is larger than the sum of its proper divisors (413284955).

1239854853 is an equidigital number, since it uses as much as digits as its factorization.

1239854853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 413284954.

The product of its digits is 1036800, while the sum is 48.

The square root of 1239854853 is about 35211.5727140950. The cubic root of 1239854853 is about 1074.2951508579.

The spelling of 1239854853 in words is "one billion, two hundred thirty-nine million, eight hundred fifty-four thousand, eight hundred fifty-three".