551977693 has 2 divisors, whose sum is σ = 551977694. Its totient is φ = 551977692.

The previous prime is 551977681. The next prime is 551977697. The reversal of 551977693 is 396779155.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 551921049 + 56644 = 23493^2 + 238^2 .

It is a cyclic number.

It is not a de Polignac number, because 551977693 - 2²⁹ = 15106781 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 551977693.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (551977697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275988846 + 275988847.

It is an arithmetic number, because the mean of its divisors is an integer number (275988847).

Almost surely, 2^551977693 is an apocalyptic number.

It is an amenable number.

551977693 is a deficient number, since it is larger than the sum of its proper divisors (1).

551977693 is an equidigital number, since it uses as much as digits as its factorization.

551977693 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1786050, while the sum is 52.

The square root of 551977693 is about 23494.2055196595. The cubic root of 551977693 is about 820.3021358362.

The spelling of 551977693 in words is "five hundred fifty-one million, nine hundred seventy-seven thousand, six hundred ninety-three".