1213471953 has 12 divisors (see below), whose sum is σ = 1757819700. Its totient is φ = 806661216.

The previous prime is 1213471901. The next prime is 1213471981. The reversal of 1213471953 is 3591743121.

1213471953 is a `hidden beast` number, since 121 + 347 + 195 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 299739969 + 913731984 = 17313^2 + 30228^2 .

It is not a de Polignac number, because 1213471953 - 2¹⁶ = 1213406417 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1213471253) 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, 190026 + ... + 196307.

It is an arithmetic number, because the mean of its divisors is an integer number (146484975).

Almost surely, 2^1213471953 is an apocalyptic number.

It is an amenable number.

1213471953 is a deficient number, since it is larger than the sum of its proper divisors (544347747).

1213471953 is a wasteful number, since it uses less digits than its factorization.

1213471953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 386688 (or 386685 counting only the distinct ones).

The product of its digits is 22680, while the sum is 36.

The square root of 1213471953 is about 34834.9243288973. The cubic root of 1213471953 is about 1066.6204703409.

The spelling of 1213471953 in words is "one billion, two hundred thirteen million, four hundred seventy-one thousand, nine hundred fifty-three".