149809507 has 2 divisors, whose sum is σ = 149809508. Its totient is φ = 149809506.

The previous prime is 149809493. The next prime is 149809529. The reversal of 149809507 is 705908941.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 149809507 - 2⁷ = 149809379 is a prime.

It is a nialpdrome in base 11.

It is not a weakly prime, because it can be changed into another prime (149809567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74904753 + 74904754.

It is an arithmetic number, because the mean of its divisors is an integer number (74904754).

Almost surely, 2^149809507 is an apocalyptic number.

149809507 is a deficient number, since it is larger than the sum of its proper divisors (1).

149809507 is an equidigital number, since it uses as much as digits as its factorization.

149809507 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90720, while the sum is 43.

The square root of 149809507 is about 12239.6693991300. The cubic root of 149809507 is about 531.1042681789.

The spelling of 149809507 in words is "one hundred forty-nine million, eight hundred nine thousand, five hundred seven".