309485477 has 12 divisors (see below), whose sum is σ = 366321696. Its totient is φ = 256121040.

The previous prime is 309485467. The next prime is 309485531. The reversal of 309485477 is 774584903.

It is not a de Polignac number, because 309485477 - 2⁶ = 309485413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (309485437) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20399 + ... + 32172.

It is an arithmetic number, because the mean of its divisors is an integer number (30526808).

Almost surely, 2^309485477 is an apocalyptic number.

It is an amenable number.

309485477 is a deficient number, since it is larger than the sum of its proper divisors (56836219).

309485477 is an equidigital number, since it uses as much as digits as its factorization.

309485477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52636 (or 52607 counting only the distinct ones).

The product of its (nonzero) digits is 846720, while the sum is 47.

The square root of 309485477 is about 17592.1993224270. The cubic root of 309485477 is about 676.4153034624.

The spelling of 309485477 in words is "three hundred nine million, four hundred eighty-five thousand, four hundred seventy-seven".