1020019249 has 4 divisors (see below), whose sum is σ = 1064367936. Its totient is φ = 975670564.

The previous prime is 1020019243. The next prime is 1020019267. The reversal of 1020019249 is 9429100201.

It is a happy number.

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 1020019249 - 2²¹ = 1017922097 is a prime.

It is a super-3 number, since 3×1020019249³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1020019243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22174309 + ... + 22174354.

It is an arithmetic number, because the mean of its divisors is an integer number (266091984).

Almost surely, 2^1020019249 is an apocalyptic number.

It is an amenable number.

1020019249 is a deficient number, since it is larger than the sum of its proper divisors (44348687).

1020019249 is an equidigital number, since it uses as much as digits as its factorization.

1020019249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44348686.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 1020019249 is about 31937.7401987054. The cubic root of 1020019249 is about 1006.6290417035.

The spelling of 1020019249 in words is "one billion, twenty million, nineteen thousand, two hundred forty-nine".