306691601 has 4 divisors (see below), whose sum is σ = 307014372. Its totient is φ = 306368832.

The previous prime is 306691589. The next prime is 306691613. The reversal of 306691601 is 106196603.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 106196603 = 17 ⋅6246859.

It is an interprime number because it is at equal distance from previous prime (306691589) and next prime (306691613).

It can be written as a sum of positive squares in 2 ways, for example, as 224970001 + 81721600 = 14999^2 + 9040^2 .

It is a cyclic number.

It is not a de Polignac number, because 306691601 - 2²² = 302497297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (306691621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 159956 + ... + 161861.

It is an arithmetic number, because the mean of its divisors is an integer number (76753593).

Almost surely, 2^306691601 is an apocalyptic number.

It is an amenable number.

306691601 is a deficient number, since it is larger than the sum of its proper divisors (322771).

306691601 is an equidigital number, since it uses as much as digits as its factorization.

306691601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322770.

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 306691601 is about 17512.6126263331. The cubic root of 306691601 is about 674.3737042134.

The spelling of 306691601 in words is "three hundred six million, six hundred ninety-one thousand, six hundred one".