7551997 has 2 divisors, whose sum is σ = 7551998. Its totient is φ = 7551996.

The previous prime is 7551991. The next prime is 7552001. The reversal of 7551997 is 7991557.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7458361 + 93636 = 2731^2 + 306^2 .

It is a cyclic number.

It is not a de Polignac number, because 7551997 - 2³ = 7551989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7551991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3775998 + 3775999.

It is an arithmetic number, because the mean of its divisors is an integer number (3775999).

Almost surely, 2^7551997 is an apocalyptic number.

It is an amenable number.

7551997 is a deficient number, since it is larger than the sum of its proper divisors (1).

7551997 is an equidigital number, since it uses as much as digits as its factorization.

7551997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 99225, while the sum is 43.

The square root of 7551997 is about 2748.0897001372. The cubic root of 7551997 is about 196.1946992818.

The spelling of 7551997 in words is "seven million, five hundred fifty-one thousand, nine hundred ninety-seven".