609250091 has 4 divisors (see below), whose sum is σ = 609616800. Its totient is φ = 608883384.

The previous prime is 609250087. The next prime is 609250093. The reversal of 609250091 is 190052906.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 190052906 = 2 ⋅95026453.

It is a cyclic number.

It is not a de Polignac number, because 609250091 - 2² = 609250087 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (609250093) 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, 180851 + ... + 184188.

It is an arithmetic number, because the mean of its divisors is an integer number (152404200).

Almost surely, 2^609250091 is an apocalyptic number.

609250091 is a deficient number, since it is larger than the sum of its proper divisors (366709).

609250091 is a wasteful number, since it uses less digits than its factorization.

609250091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366708.

The product of its (nonzero) digits is 4860, while the sum is 32.

The square root of 609250091 is about 24682.9919377696. The cubic root of 609250091 is about 847.7449295705.

The spelling of 609250091 in words is "six hundred nine million, two hundred fifty thousand, ninety-one".