307849145 has 4 divisors (see below), whose sum is σ = 369418980. Its totient is φ = 246279312.

The previous prime is 307849109. The next prime is 307849147. The reversal of 307849145 is 541948703.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 541948703 = 131 ⋅4137013.

It can be written as a sum of positive squares in 2 ways, for example, as 38987536 + 268861609 = 6244^2 + 16397^2 .

It is a cyclic number.

It is not a de Polignac number, because 307849145 - 2⁶ = 307849081 is a prime.

It is not an unprimeable number, because it can be changed into a prime (307849147) 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, 30784910 + ... + 30784919.

It is an arithmetic number, because the mean of its divisors is an integer number (92354745).

Almost surely, 2^307849145 is an apocalyptic number.

It is an amenable number.

307849145 is a deficient number, since it is larger than the sum of its proper divisors (61569835).

307849145 is an equidigital number, since it uses as much as digits as its factorization.

307849145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61569834.

The product of its (nonzero) digits is 120960, while the sum is 41.

The square root of 307849145 is about 17545.6303677012. The cubic root of 307849145 is about 675.2210670516.

The spelling of 307849145 in words is "three hundred seven million, eight hundred forty-nine thousand, one hundred forty-five".