149238866417 has 2 divisors, whose sum is σ = 149238866418. Its totient is φ = 149238866416.

The previous prime is 149238866393. The next prime is 149238866419. The reversal of 149238866417 is 714668832941.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 118507374001 + 30731492416 = 344249^2 + 175304^2 .

It is a cyclic number.

It is not a de Polignac number, because 149238866417 - 2¹⁰ = 149238865393 is a prime.

Together with 149238866419, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (149238866419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74619433208 + 74619433209.

It is an arithmetic number, because the mean of its divisors is an integer number (74619433209).

Almost surely, 2^149238866417 is an apocalyptic number.

It is an amenable number.

149238866417 is a deficient number, since it is larger than the sum of its proper divisors (1).

149238866417 is an equidigital number, since it uses as much as digits as its factorization.

149238866417 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13934592, while the sum is 59.

The spelling of 149238866417 in words is "one hundred forty-nine billion, two hundred thirty-eight million, eight hundred sixty-six thousand, four hundred seventeen".