54195109 has 2 divisors, whose sum is σ = 54195110. Its totient is φ = 54195108.

The previous prime is 54195103. The next prime is 54195131. The reversal of 54195109 is 90159145.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30283009 + 23912100 = 5503^2 + 4890^2 .

It is a cyclic number.

It is not a de Polignac number, because 54195109 - 2⁵ = 54195077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54195103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27097554 + 27097555.

It is an arithmetic number, because the mean of its divisors is an integer number (27097555).

Almost surely, 2^54195109 is an apocalyptic number.

It is an amenable number.

54195109 is a deficient number, since it is larger than the sum of its proper divisors (1).

54195109 is an equidigital number, since it uses as much as digits as its factorization.

54195109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8100, while the sum is 34.

The square root of 54195109 is about 7361.7327444020. The cubic root of 54195109 is about 378.4309936107.

The spelling of 54195109 in words is "fifty-four million, one hundred ninety-five thousand, one hundred nine".