123997766 has 4 divisors (see below), whose sum is σ = 185996652. Its totient is φ = 61998882.

The previous prime is 123997759. The next prime is 123997829. The reversal of 123997766 is 667799321.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30999440 + ... + 30999443.

It is an arithmetic number, because the mean of its divisors is an integer number (46499163).

Almost surely, 2^123997766 is an apocalyptic number.

123997766 is a deficient number, since it is larger than the sum of its proper divisors (61998886).

123997766 is an equidigital number, since it uses as much as digits as its factorization.

123997766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61998885.

The product of its digits is 857304, while the sum is 50.

The square root of 123997766 is about 11135.4284156471. The cubic root of 123997766 is about 498.6601005463.

The spelling of 123997766 in words is "one hundred twenty-three million, nine hundred ninety-seven thousand, seven hundred sixty-six".