123690772 has 12 divisors (see below), whose sum is σ = 216750100. Its totient is φ = 61762176.

The previous prime is 123690769. The next prime is 123690799. The reversal of 123690772 is 277096321.

It can be written as a sum of positive squares in 2 ways, for example, as 80209936 + 43480836 = 8956^2 + 6594^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17397 + ... + 23452.

Almost surely, 2^123690772 is an apocalyptic number.

It is an amenable number.

123690772 is a deficient number, since it is larger than the sum of its proper divisors (93059328).

123690772 is a wasteful number, since it uses less digits than its factorization.

123690772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41610 (or 41608 counting only the distinct ones).

The product of its (nonzero) digits is 31752, while the sum is 37.

The square root of 123690772 is about 11121.6353114099. The cubic root of 123690772 is about 498.2482324551.

The spelling of 123690772 in words is "one hundred twenty-three million, six hundred ninety thousand, seven hundred seventy-two".