199401893 has 2 divisors, whose sum is σ = 199401894. Its totient is φ = 199401892.

The previous prime is 199401877. The next prime is 199401907. The reversal of 199401893 is 398104991.

199401893 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 130462084 + 68939809 = 11422^2 + 8303^2 .

It is a cyclic number.

It is not a de Polignac number, because 199401893 - 2⁴ = 199401877 is a prime.

It is a super-2 number, since 2×199401893² = 79522229863966898, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199401193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99700946 + 99700947.

It is an arithmetic number, because the mean of its divisors is an integer number (99700947).

Almost surely, 2^199401893 is an apocalyptic number.

It is an amenable number.

199401893 is a deficient number, since it is larger than the sum of its proper divisors (1).

199401893 is an equidigital number, since it uses as much as digits as its factorization.

199401893 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69984, while the sum is 44.

The square root of 199401893 is about 14120.9735145988. The cubic root of 199401893 is about 584.2200070635.

The spelling of 199401893 in words is "one hundred ninety-nine million, four hundred one thousand, eight hundred ninety-three".