199023547 has 2 divisors, whose sum is σ = 199023548. Its totient is φ = 199023546.

The previous prime is 199023527. The next prime is 199023571. The reversal of 199023547 is 745320991.

It is a weak prime.

It is an emirp because it is prime and its reverse (745320991) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-199023547 is a prime.

It is a super-2 number, since 2×199023547² = 79220744520922418, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (199023527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99511773 + 99511774.

It is an arithmetic number, because the mean of its divisors is an integer number (99511774).

Almost surely, 2^199023547 is an apocalyptic number.

199023547 is a deficient number, since it is larger than the sum of its proper divisors (1).

199023547 is an equidigital number, since it uses as much as digits as its factorization.

199023547 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 68040, while the sum is 40.

The square root of 199023547 is about 14107.5705562652. The cubic root of 199023547 is about 583.8502726107.

The spelling of 199023547 in words is "one hundred ninety-nine million, twenty-three thousand, five hundred forty-seven".