1047397187 has 4 divisors (see below), whose sum is σ = 1053451680. Its totient is φ = 1041342696.

The previous prime is 1047397171. The next prime is 1047397201. The reversal of 1047397187 is 7817937401.

It is a happy number.

1047397187 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7817937401 = 27109 ⋅288389.

It is a cyclic number.

It is not a de Polignac number, because 1047397187 - 2⁴ = 1047397171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1047397157) 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, 3026987 + ... + 3027332.

It is an arithmetic number, because the mean of its divisors is an integer number (263362920).

Almost surely, 2^1047397187 is an apocalyptic number.

1047397187 is a deficient number, since it is larger than the sum of its proper divisors (6054493).

1047397187 is an equidigital number, since it uses as much as digits as its factorization.

1047397187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6054492.

The product of its (nonzero) digits is 296352, while the sum is 47.

The square root of 1047397187 is about 32363.5162953595. The cubic root of 1047397187 is about 1015.5558239237. Note that the first 3 decimals are identical.

The spelling of 1047397187 in words is "one billion, forty-seven million, three hundred ninety-seven thousand, one hundred eighty-seven".