149688541 has 2 divisors, whose sum is σ = 149688542. Its totient is φ = 149688540.

The previous prime is 149688521. The next prime is 149688551. The reversal of 149688541 is 145886941.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 98922916 + 50765625 = 9946^2 + 7125^2 .

It is a cyclic number.

It is not a de Polignac number, because 149688541 - 2⁵ = 149688509 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 149688491 and 149688500.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (149688521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74844270 + 74844271.

It is an arithmetic number, because the mean of its divisors is an integer number (74844271).

Almost surely, 2^149688541 is an apocalyptic number.

It is an amenable number.

149688541 is a deficient number, since it is larger than the sum of its proper divisors (1).

149688541 is an equidigital number, since it uses as much as digits as its factorization.

149688541 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 276480, while the sum is 46.

The square root of 149688541 is about 12234.7268461539. The cubic root of 149688541 is about 530.9612802383.

The spelling of 149688541 in words is "one hundred forty-nine million, six hundred eighty-eight thousand, five hundred forty-one".