149691959 has 2 divisors, whose sum is σ = 149691960. Its totient is φ = 149691958.

The previous prime is 149691931. The next prime is 149691961. The reversal of 149691959 is 959196941.

It is a strong prime.

It is an emirp because it is prime and its reverse (959196941) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 149691959 - 2¹⁶ = 149626423 is a prime.

It is a Sophie Germain prime.

Together with 149691961, it forms a pair of twin primes.

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 149691959.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (149691929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74845979 + 74845980.

It is an arithmetic number, because the mean of its divisors is an integer number (74845980).

Almost surely, 2^149691959 is an apocalyptic number.

149691959 is a deficient number, since it is larger than the sum of its proper divisors (1).

149691959 is an equidigital number, since it uses as much as digits as its factorization.

149691959 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 787320, while the sum is 53.

The square root of 149691959 is about 12234.8665297174. The cubic root of 149691959 is about 530.9653215448.

The spelling of 149691959 in words is "one hundred forty-nine million, six hundred ninety-one thousand, nine hundred fifty-nine".