249802031 has 2 divisors, whose sum is σ = 249802032. Its totient is φ = 249802030.

The previous prime is 249802019. The next prime is 249802079. The reversal of 249802031 is 130208942.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 249802031 - 2²² = 245607727 is a prime.

It is a super-2 number, since 2×249802031² = 124802109383449922, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 249801985 and 249802003.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (249802001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124901015 + 124901016.

It is an arithmetic number, because the mean of its divisors is an integer number (124901016).

Almost surely, 2^249802031 is an apocalyptic number.

249802031 is a deficient number, since it is larger than the sum of its proper divisors (1).

249802031 is an equidigital number, since it uses as much as digits as its factorization.

249802031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 249802031 is about 15805.1267315387. The cubic root of 249802031 is about 629.7941974959.

The spelling of 249802031 in words is "two hundred forty-nine million, eight hundred two thousand, thirty-one".