309472963 has 4 divisors (see below), whose sum is σ = 309597768. Its totient is φ = 309348160.

The previous prime is 309472951. The next prime is 309472967. The reversal of 309472963 is 369274903.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 369274903 = 53 ⋅6967451.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-309472963 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (309472967) 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, 58606 + ... + 63667.

It is an arithmetic number, because the mean of its divisors is an integer number (77399442).

Almost surely, 2^309472963 is an apocalyptic number.

309472963 is a deficient number, since it is larger than the sum of its proper divisors (124805).

309472963 is a wasteful number, since it uses less digits than its factorization.

309472963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124804.

The product of its (nonzero) digits is 244944, while the sum is 43.

The square root of 309472963 is about 17591.8436498282. The cubic root of 309472963 is about 676.4061864215.

It can be divided in two parts, 3094 and 72963, that multiplied together give a palindrome (225747522).

The spelling of 309472963 in words is "three hundred nine million, four hundred seventy-two thousand, nine hundred sixty-three".