199901015 has 8 divisors (see below), whose sum is σ = 239960448. Its totient is φ = 159868000.

The previous prime is 199901003. The next prime is 199901017. The reversal of 199901015 is 510109991.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 199901015 - 2⁶ = 199900951 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199901017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19265 + ... + 27765.

It is an arithmetic number, because the mean of its divisors is an integer number (29995056).

Almost surely, 2^199901015 is an apocalyptic number.

199901015 is a deficient number, since it is larger than the sum of its proper divisors (40059433).

199901015 is an equidigital number, since it uses as much as digits as its factorization.

199901015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13209.

The product of its (nonzero) digits is 3645, while the sum is 35.

The square root of 199901015 is about 14138.6355423711. The cubic root of 199901015 is about 584.7070537565.

The spelling of 199901015 in words is "one hundred ninety-nine million, nine hundred one thousand, fifteen".