149890061 has 2 divisors, whose sum is σ = 149890062. Its totient is φ = 149890060.

The previous prime is 149890051. The next prime is 149890079. The reversal of 149890061 is 160098941.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 143161225 + 6728836 = 11965^2 + 2594^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-149890061 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 149889997 and 149890024.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (149890021) 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, 74945030 + 74945031.

It is an arithmetic number, because the mean of its divisors is an integer number (74945031).

Almost surely, 2^149890061 is an apocalyptic number.

It is an amenable number.

149890061 is a deficient number, since it is larger than the sum of its proper divisors (1).

149890061 is an equidigital number, since it uses as much as digits as its factorization.

149890061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 38.

The square root of 149890061 is about 12242.9596503460. The cubic root of 149890061 is about 531.1994443979.

The spelling of 149890061 in words is "one hundred forty-nine million, eight hundred ninety thousand, sixty-one".