1231904947 has 32 divisors (see below), whose sum is σ = 1555430912. Its totient is φ = 949791744.

The previous prime is 1231904903. The next prime is 1231904951. The reversal of 1231904947 is 7494091321.

It is a cyclic number.

It is not a de Polignac number, because 1231904947 - 2¹¹ = 1231902899 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1231904977) 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, 590368 + ... + 592450.

It is an arithmetic number, because the mean of its divisors is an integer number (48607216).

Almost surely, 2^1231904947 is an apocalyptic number.

1231904947 is a deficient number, since it is larger than the sum of its proper divisors (323525965).

1231904947 is a wasteful number, since it uses less digits than its factorization.

1231904947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2267.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 1231904947 is about 35098.5034866161. The cubic root of 1231904947 is about 1071.9941114415.

The spelling of 1231904947 in words is "one billion, two hundred thirty-one million, nine hundred four thousand, nine hundred forty-seven".