195149101 has 4 divisors (see below), whose sum is σ = 223027552. Its totient is φ = 167270652.

The previous prime is 195149099. The next prime is 195149107. The reversal of 195149101 is 101941591.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 101941591 = 523 ⋅194917.

It is a cyclic number.

It is not a de Polignac number, because 195149101 - 2¹ = 195149099 is a prime.

It is a super-2 number, since 2×195149101² = 76166343242216402, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (195149107) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13939215 + ... + 13939228.

It is an arithmetic number, because the mean of its divisors is an integer number (55756888).

Almost surely, 2^195149101 is an apocalyptic number.

It is an amenable number.

195149101 is a deficient number, since it is larger than the sum of its proper divisors (27878451).

195149101 is an equidigital number, since it uses as much as digits as its factorization.

195149101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27878450.

The product of its (nonzero) digits is 1620, while the sum is 31.

The square root of 195149101 is about 13969.5776958360. The cubic root of 195149101 is about 580.0367604525.

The spelling of 195149101 in words is "one hundred ninety-five million, one hundred forty-nine thousand, one hundred one".