199020401 has 2 divisors, whose sum is σ = 199020402. Its totient is φ = 199020400.

The previous prime is 199020397. The next prime is 199020427. The reversal of 199020401 is 104020991.

It is an a-pointer prime, because the next prime (199020427) can be obtained adding 199020401 to its sum of digits (26).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 192543376 + 6477025 = 13876^2 + 2545^2 .

It is a cyclic number.

It is not a de Polignac number, because 199020401 - 2² = 199020397 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (199020461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99510200 + 99510201.

It is an arithmetic number, because the mean of its divisors is an integer number (99510201).

Almost surely, 2^199020401 is an apocalyptic number.

It is an amenable number.

199020401 is a deficient number, since it is larger than the sum of its proper divisors (1).

199020401 is an equidigital number, since it uses as much as digits as its factorization.

199020401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 199020401 is about 14107.4590554075. The cubic root of 199020401 is about 583.8471962533.

The spelling of 199020401 in words is "one hundred ninety-nine million, twenty thousand, four hundred one".