1147997 has 2 divisors, whose sum is σ = 1147998. Its totient is φ = 1147996.

The previous prime is 1147987. The next prime is 1148029. The reversal of 1147997 is 7997411.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 857476 + 290521 = 926^2 + 539^2 .

It is a cyclic number.

It is not a de Polignac number, because 1147997 - 2⁴ = 1147981 is a prime.

It is a super-2 number, since 2×1147997² = 2635794224018, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1147997.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1147987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 573998 + 573999.

It is an arithmetic number, because the mean of its divisors is an integer number (573999).

2^1147997 is an apocalyptic number.

It is an amenable number.

1147997 is a deficient number, since it is larger than the sum of its proper divisors (1).

1147997 is an equidigital number, since it uses as much as digits as its factorization.

1147997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15876, while the sum is 38.

The square root of 1147997 is about 1071.4462189023. The cubic root of 1147997 is about 104.7080932385.

The spelling of 1147997 in words is "one million, one hundred forty-seven thousand, nine hundred ninety-seven".