309148653 has 32 divisors (see below), whose sum is σ = 468840960. Its totient is φ = 179530560.

The previous prime is 309148643. The next prime is 309148661. The reversal of 309148653 is 356841903.

It is not a de Polignac number, because 309148653 - 2¹² = 309144557 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (309148633) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 79918 + ... + 83696.

It is an arithmetic number, because the mean of its divisors is an integer number (14651280).

Almost surely, 2^309148653 is an apocalyptic number.

309148653 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

It is an amenable number.

309148653 is a deficient number, since it is larger than the sum of its proper divisors (159692307).

309148653 is a wasteful number, since it uses less digits than its factorization.

309148653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3897.

The product of its (nonzero) digits is 77760, while the sum is 39.

The square root of 309148653 is about 17582.6236096892. The cubic root of 309148653 is about 676.1698254804.

The spelling of 309148653 in words is "three hundred nine million, one hundred forty-eight thousand, six hundred fifty-three".