149909951 has 2 divisors, whose sum is σ = 149909952. Its totient is φ = 149909950.

The previous prime is 149909941. The next prime is 149909983. The reversal of 149909951 is 159909941.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (159909941) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 149909951 - 2¹⁸ = 149647807 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 149909896 and 149909905.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (149909941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74954975 + 74954976.

It is an arithmetic number, because the mean of its divisors is an integer number (74954976).

Almost surely, 2^149909951 is an apocalyptic number.

149909951 is a deficient number, since it is larger than the sum of its proper divisors (1).

149909951 is an equidigital number, since it uses as much as digits as its factorization.

149909951 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 131220, while the sum is 47.

The square root of 149909951 is about 12243.7719269839. The cubic root of 149909951 is about 531.2229395951. Note that the first 3 decimals are identical.

The spelling of 149909951 in words is "one hundred forty-nine million, nine hundred nine thousand, nine hundred fifty-one".