147668690 has 16 divisors (see below), whose sum is σ = 286250328. Its totient is φ = 54523776.

The previous prime is 147668683. The next prime is 147668701. The reversal of 147668690 is 96866741.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 75707401 + 71961289 = 8701^2 + 8483^2 .

It is a super-2 number, since 2×147668690² = 43612084012632200, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 567827 + ... + 568086.

Almost surely, 2^147668690 is an apocalyptic number.

147668690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

147668690 is a deficient number, since it is larger than the sum of its proper divisors (138581638).

147668690 is a wasteful number, since it uses less digits than its factorization.

147668690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1135933.

The product of its (nonzero) digits is 435456, while the sum is 47.

The square root of 147668690 is about 12151.9006743801. The cubic root of 147668690 is about 528.5622478144.

The spelling of 147668690 in words is "one hundred forty-seven million, six hundred sixty-eight thousand, six hundred ninety".