1047217997 has 16 divisors (see below), whose sum is σ = 1208942592. Its totient is φ = 888557040.

The previous prime is 1047217987. The next prime is 1047218009. The reversal of 1047217997 is 7997127401.

It is a happy number.

It is not a de Polignac number, because 1047217997 - 2⁸ = 1047217741 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1047217907) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 506588 + ... + 508650.

It is an arithmetic number, because the mean of its divisors is an integer number (75558912).

Almost surely, 2^1047217997 is an apocalyptic number.

It is an amenable number.

1047217997 is a deficient number, since it is larger than the sum of its proper divisors (161724595).

1047217997 is a wasteful number, since it uses less digits than its factorization.

1047217997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2768.

The product of its (nonzero) digits is 222264, while the sum is 47.

The square root of 1047217997 is about 32360.7477818421. The cubic root of 1047217997 is about 1015.4979064405.

The spelling of 1047217997 in words is "one billion, forty-seven million, two hundred seventeen thousand, nine hundred ninety-seven".