149117389909 has 2 divisors, whose sum is σ = 149117389910. Its totient is φ = 149117389908.

The previous prime is 149117389877. The next prime is 149117389921. The reversal of 149117389909 is 909983711941.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 147682647025 + 1434742884 = 384295^2 + 37878^2 .

It is a cyclic number.

It is not a de Polignac number, because 149117389909 - 2⁵ = 149117389877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (149117389709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74558694954 + 74558694955.

It is an arithmetic number, because the mean of its divisors is an integer number (74558694955).

Almost surely, 2^149117389909 is an apocalyptic number.

It is an amenable number.

149117389909 is a deficient number, since it is larger than the sum of its proper divisors (1).

149117389909 is an equidigital number, since it uses as much as digits as its factorization.

149117389909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4408992, while the sum is 61.

The spelling of 149117389909 in words is "one hundred forty-nine billion, one hundred seventeen million, three hundred eighty-nine thousand, nine hundred nine".