1947009953 has 12 divisors (see below), whose sum is σ = 2267979840. Its totient is φ = 1666588392.

The previous prime is 1947009947. The next prime is 1947010049. The reversal of 1947009953 is 3599007491.

It is not a de Polignac number, because 1947009953 - 2⁸ = 1947009697 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1947009898 and 1947009907.

It is not an unprimeable number, because it can be changed into a prime (1947009913) 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, 9668 + ... + 63146.

It is an arithmetic number, because the mean of its divisors is an integer number (188998320).

Almost surely, 2^1947009953 is an apocalyptic number.

It is an amenable number.

1947009953 is a deficient number, since it is larger than the sum of its proper divisors (320969887).

1947009953 is an equidigital number, since it uses as much as digits as its factorization.

1947009953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54236 (or 54229 counting only the distinct ones).

The product of its (nonzero) digits is 306180, while the sum is 47.

The square root of 1947009953 is about 44124.9357279985. The cubic root of 1947009953 is about 1248.6940928002.

The spelling of 1947009953 in words is "one billion, nine hundred forty-seven million, nine thousand, nine hundred fifty-three".