199272440677 has 2 divisors, whose sum is σ = 199272440678. Its totient is φ = 199272440676.

The previous prime is 199272440623. The next prime is 199272440699. The reversal of 199272440677 is 776044272991.

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., 144971324001 + 54301116676 = 380751^2 + 233026^2 .

It is a cyclic number.

It is not a de Polignac number, because 199272440677 - 2²³ = 199264052069 is a prime.

It is a super-2 number, since 2×199272440677² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199272440617) 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, 99636220338 + 99636220339.

It is an arithmetic number, because the mean of its divisors is an integer number (99636220339).

Almost surely, 2^199272440677 is an apocalyptic number.

It is an amenable number.

199272440677 is a deficient number, since it is larger than the sum of its proper divisors (1).

199272440677 is an equidigital number, since it uses as much as digits as its factorization.

199272440677 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10668672, while the sum is 58.

The spelling of 199272440677 in words is "one hundred ninety-nine billion, two hundred seventy-two million, four hundred forty thousand, six hundred seventy-seven".