149706761 has 4 divisors (see below), whose sum is σ = 150572292. Its totient is φ = 148841232.

The previous prime is 149706677. The next prime is 149706763. The reversal of 149706761 is 167607941.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 167607941 = 1013 ⋅165457.

It can be written as a sum of positive squares in 2 ways, for example, as 128958736 + 20748025 = 11356^2 + 4555^2 .

It is a cyclic number.

It is not a de Polignac number, because 149706761 - 2²² = 145512457 is a prime.

It is a super-2 number, since 2×149706761² = 44824228578222242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (149706763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 432506 + ... + 432851.

It is an arithmetic number, because the mean of its divisors is an integer number (37643073).

Almost surely, 2^149706761 is an apocalyptic number.

It is an amenable number.

149706761 is a deficient number, since it is larger than the sum of its proper divisors (865531).

149706761 is an equidigital number, since it uses as much as digits as its factorization.

149706761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 865530.

The product of its (nonzero) digits is 63504, while the sum is 41.

The square root of 149706761 is about 12235.4714253273. The cubic root of 149706761 is about 530.9828221278.

The spelling of 149706761 in words is "one hundred forty-nine million, seven hundred six thousand, seven hundred sixty-one".