305796149 has 6 divisors (see below), whose sum is σ = 307032726. Its totient is φ = 304564520.

The previous prime is 305796137. The next prime is 305796173. The reversal of 305796149 is 941697503.

It can be written as a sum of positive squares in only one way, i.e., 292239025 + 13557124 = 17095^2 + 3682^2 .

It is not a de Polignac number, because 305796149 - 2⁴ = 305796133 is a prime.

It is a super-2 number, since 2×305796149² = 187022569486460402, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (305796199) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 66959 + ... + 71379.

It is an arithmetic number, because the mean of its divisors is an integer number (51172121).

Almost surely, 2^305796149 is an apocalyptic number.

It is an amenable number.

305796149 is a deficient number, since it is larger than the sum of its proper divisors (1236577).

305796149 is an frugal number, since it uses more digits than its factorization.

305796149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4947 (or 4684 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 44.

The square root of 305796149 is about 17487.0280207930. The cubic root of 305796149 is about 673.7167381232.

The spelling of 305796149 in words is "three hundred five million, seven hundred ninety-six thousand, one hundred forty-nine".