551653997 has 2 divisors, whose sum is σ = 551653998. Its totient is φ = 551653996.

The previous prime is 551653987. The next prime is 551654099. The reversal of 551653997 is 799356155.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 461992036 + 89661961 = 21494^2 + 9469^2 .

It is a cyclic number.

It is not a de Polignac number, because 551653997 - 2¹⁴ = 551637613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (551653957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275826998 + 275826999.

It is an arithmetic number, because the mean of its divisors is an integer number (275826999).

Almost surely, 2^551653997 is an apocalyptic number.

It is an amenable number.

551653997 is a deficient number, since it is larger than the sum of its proper divisors (1).

551653997 is an equidigital number, since it uses as much as digits as its factorization.

551653997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1275750, while the sum is 50.

The square root of 551653997 is about 23487.3156618631. The cubic root of 551653997 is about 820.1417546921.

The spelling of 551653997 in words is "five hundred fifty-one million, six hundred fifty-three thousand, nine hundred ninety-seven".