149990417 has 2 divisors, whose sum is σ = 149990418. Its totient is φ = 149990416.

The previous prime is 149990413. The next prime is 149990419. The reversal of 149990417 is 714099941.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 132342016 + 17648401 = 11504^2 + 4201^2 .

It is an emirp because it is prime and its reverse (714099941) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 149990417 - 2² = 149990413 is a prime.

Together with 149990419, 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 (149990413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74995208 + 74995209.

It is an arithmetic number, because the mean of its divisors is an integer number (74995209).

Almost surely, 2^149990417 is an apocalyptic number.

It is an amenable number.

149990417 is a deficient number, since it is larger than the sum of its proper divisors (1).

149990417 is an equidigital number, since it uses as much as digits as its factorization.

149990417 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 81648, while the sum is 44.

The square root of 149990417 is about 12247.0574833304. The cubic root of 149990417 is about 531.3179693980.

The spelling of 149990417 in words is "one hundred forty-nine million, nine hundred ninety thousand, four hundred seventeen".