123771764 has 18 divisors (see below), whose sum is σ = 230093430. Its totient is φ = 58244992.

The previous prime is 123771761. The next prime is 123771773. The reversal of 123771764 is 467177321.

It can be written as a sum of positive squares in 3 ways, for example, as 83576164 + 40195600 = 9142^2 + 6340^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123771761) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 52379 + ... + 54690.

Almost surely, 2^123771764 is an apocalyptic number.

It is an amenable number.

123771764 is a deficient number, since it is larger than the sum of its proper divisors (106321666).

123771764 is a wasteful number, since it uses less digits than its factorization.

123771764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107107 (or 107088 counting only the distinct ones).

The product of its digits is 49392, while the sum is 38.

The square root of 123771764 is about 11125.2759066910. The cubic root of 123771764 is about 498.3569587449.

It can be divided in two parts, 12377 and 1764, that added together give a palindrome (14141).

The spelling of 123771764 in words is "one hundred twenty-three million, seven hundred seventy-one thousand, seven hundred sixty-four".