249690073 has 4 divisors (see below), whose sum is σ = 249730020. Its totient is φ = 249650128.

The previous prime is 249690071. The next prime is 249690107. The reversal of 249690073 is 370096942.

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 143352729 + 106337344 = 11973^2 + 10312^2 .

It is a cyclic number.

It is not a de Polignac number, because 249690073 - 2¹ = 249690071 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (249690071) 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, 8338 + ... + 23851.

It is an arithmetic number, because the mean of its divisors is an integer number (62432505).

Almost surely, 2^249690073 is an apocalyptic number.

It is an amenable number.

249690073 is a deficient number, since it is larger than the sum of its proper divisors (39947).

249690073 is an equidigital number, since it uses as much as digits as its factorization.

249690073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39946.

The product of its (nonzero) digits is 81648, while the sum is 40.

The square root of 249690073 is about 15801.5845091560. The cubic root of 249690073 is about 629.7000949312.

The spelling of 249690073 in words is "two hundred forty-nine million, six hundred ninety thousand, seventy-three".