249385433123 has 4 divisors (see below), whose sum is σ = 250104123480. Its totient is φ = 248666742768.

The previous prime is 249385432991. The next prime is 249385433131. The reversal of 249385433123 is 321334583942.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 321334583942 = 2 ⋅160667291971.

It is a cyclic number.

It is not a de Polignac number, because 249385433123 - 2⁸ = 249385432867 is a prime.

It is a super-3 number, since 3×249385433123³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (249385433153) 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, 359344658 + ... + 359345351.

It is an arithmetic number, because the mean of its divisors is an integer number (62526030870).

Almost surely, 2^249385433123 is an apocalyptic number.

249385433123 is a deficient number, since it is larger than the sum of its proper divisors (718690357).

249385433123 is an equidigital number, since it uses as much as digits as its factorization.

249385433123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 718690356.

The product of its digits is 1866240, while the sum is 47.

The spelling of 249385433123 in words is "two hundred forty-nine billion, three hundred eighty-five million, four hundred thirty-three thousand, one hundred twenty-three".