1047992197 has 4 divisors (see below), whose sum is σ = 1197705376. Its totient is φ = 898279020.

The previous prime is 1047992191. The next prime is 1047992201. The reversal of 1047992197 is 7912997401.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7912997401 = 34763 ⋅227627.

It is a cyclic number.

It is not a de Polignac number, because 1047992197 - 2¹¹ = 1047990149 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1047992197.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1047992191) 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, 74856579 + ... + 74856592.

It is an arithmetic number, because the mean of its divisors is an integer number (299426344).

Almost surely, 2^1047992197 is an apocalyptic number.

It is an amenable number.

1047992197 is a deficient number, since it is larger than the sum of its proper divisors (149713179).

1047992197 is an equidigital number, since it uses as much as digits as its factorization.

1047992197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149713178.

The product of its (nonzero) digits is 285768, while the sum is 49.

The square root of 1047992197 is about 32372.7075945155. The cubic root of 1047992197 is about 1015.7480946591.

The spelling of 1047992197 in words is "one billion, forty-seven million, nine hundred ninety-two thousand, one hundred ninety-seven".