149681029 has 2 divisors, whose sum is σ = 149681030. Its totient is φ = 149681028.

The previous prime is 149681023. The next prime is 149681047. The reversal of 149681029 is 920186941.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 101002500 + 48678529 = 10050^2 + 6977^2 .

It is a cyclic number.

It is not a de Polignac number, because 149681029 - 2¹⁷ = 149549957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 149680982 and 149681000.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (149681023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74840514 + 74840515.

It is an arithmetic number, because the mean of its divisors is an integer number (74840515).

Almost surely, 2^149681029 is an apocalyptic number.

It is an amenable number.

149681029 is a deficient number, since it is larger than the sum of its proper divisors (1).

149681029 is an equidigital number, since it uses as much as digits as its factorization.

149681029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 40.

The square root of 149681029 is about 12234.4198472997. The cubic root of 149681029 is about 530.9523981336.

The spelling of 149681029 in words is "one hundred forty-nine million, six hundred eighty-one thousand, twenty-nine".