199157953 has 2 divisors, whose sum is σ = 199157954. Its totient is φ = 199157952.

The previous prime is 199157929. The next prime is 199157999. The reversal of 199157953 is 359751991.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 199148544 + 9409 = 14112^2 + 97^2 .

It is an emirp because it is prime and its reverse (359751991) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-199157953 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 199157897 and 199157906.

It is not a weakly prime, because it can be changed into another prime (199167953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99578976 + 99578977.

It is an arithmetic number, because the mean of its divisors is an integer number (99578977).

Almost surely, 2^199157953 is an apocalyptic number.

It is an amenable number.

199157953 is a deficient number, since it is larger than the sum of its proper divisors (1).

199157953 is an equidigital number, since it uses as much as digits as its factorization.

199157953 is an evil number, because the sum of its binary digits is even.

The product of its digits is 382725, while the sum is 49.

The square root of 199157953 is about 14112.3333648267. Note that the first 4 decimals coincide. The cubic root of 199157953 is about 583.9816730112.

The spelling of 199157953 in words is "one hundred ninety-nine million, one hundred fifty-seven thousand, nine hundred fifty-three".