149666399 has 2 divisors, whose sum is σ = 149666400. Its totient is φ = 149666398.

The previous prime is 149666389. The next prime is 149666411. The reversal of 149666399 is 993666941.

It is a weak prime.

It is an emirp because it is prime and its reverse (993666941) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 149666399 - 2⁴ = 149666383 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 149666399.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (149666339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74833199 + 74833200.

It is an arithmetic number, because the mean of its divisors is an integer number (74833200).

Almost surely, 2^149666399 is an apocalyptic number.

149666399 is a deficient number, since it is larger than the sum of its proper divisors (1).

149666399 is an equidigital number, since it uses as much as digits as its factorization.

149666399 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1889568, while the sum is 53.

The square root of 149666399 is about 12233.8219293890. The cubic root of 149666399 is about 530.9350989325.

The spelling of 149666399 in words is "one hundred forty-nine million, six hundred sixty-six thousand, three hundred ninety-nine".