249227129 has 4 divisors (see below), whose sum is σ = 249382500. Its totient is φ = 249071760.

The previous prime is 249227119. The next prime is 249227137. The reversal of 249227129 is 921722942.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 131721529 + 117505600 = 11477^2 + 10840^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-249227129 is a prime.

It is a super-2 number, since 2×249227129² = 124228323659165282, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 249227092 and 249227101.

It is not an unprimeable number, because it can be changed into a prime (249227119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75254 + ... + 78495.

It is an arithmetic number, because the mean of its divisors is an integer number (62345625).

Almost surely, 2^249227129 is an apocalyptic number.

It is an amenable number.

249227129 is a deficient number, since it is larger than the sum of its proper divisors (155371).

249227129 is a wasteful number, since it uses less digits than its factorization.

249227129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155370.

The product of its digits is 36288, while the sum is 38.

The square root of 249227129 is about 15786.9290553926. The cubic root of 249227129 is about 629.3106838677.

The spelling of 249227129 in words is "two hundred forty-nine million, two hundred twenty-seven thousand, one hundred twenty-nine".