1174206989 has 2 divisors, whose sum is σ = 1174206990. Its totient is φ = 1174206988.

The previous prime is 1174206961. The next prime is 1174207007. The reversal of 1174206989 is 9896024711.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1021313764 + 152893225 = 31958^2 + 12365^2 .

It is a cyclic number.

It is not a de Polignac number, because 1174206989 - 2¹² = 1174202893 is a prime.

It is a super-2 number, since 2×1174206989² = 2757524106032892242, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1174206919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 587103494 + 587103495.

It is an arithmetic number, because the mean of its divisors is an integer number (587103495).

Almost surely, 2^1174206989 is an apocalyptic number.

It is an amenable number.

1174206989 is a deficient number, since it is larger than the sum of its proper divisors (1).

1174206989 is an equidigital number, since it uses as much as digits as its factorization.

1174206989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 217728, while the sum is 47.

The square root of 1174206989 is about 34266.7037953755. The cubic root of 1174206989 is about 1054.9897018379.

The spelling of 1174206989 in words is "one billion, one hundred seventy-four million, two hundred six thousand, nine hundred eighty-nine".