123777490 has 16 divisors (see below), whose sum is σ = 232486848. Its totient is φ = 47358256.

The previous prime is 123777377. The next prime is 123777491. The reversal of 123777490 is 94777321.

It is not an unprimeable number, because it can be changed into a prime (123777491) 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 in 7 ways as a sum of consecutive naturals, for example, 268852 + ... + 269311.

It is an arithmetic number, because the mean of its divisors is an integer number (14530428).

Almost surely, 2^123777490 is an apocalyptic number.

123777490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

123777490 is a deficient number, since it is larger than the sum of its proper divisors (108709358).

123777490 is a wasteful number, since it uses less digits than its factorization.

123777490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 538193.

The product of its (nonzero) digits is 74088, while the sum is 40.

The square root of 123777490 is about 11125.5332456471. The cubic root of 123777490 is about 498.3646437178.

The spelling of 123777490 in words is "one hundred twenty-three million, seven hundred seventy-seven thousand, four hundred ninety".