123401749 has 4 divisors (see below), whose sum is σ = 123427936. Its totient is φ = 123375564.

The previous prime is 123401737. The next prime is 123401753. The reversal of 123401749 is 947104321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 123401749 - 2²³ = 115013141 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 123401749.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123401779) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3849 + ... + 16174.

It is an arithmetic number, because the mean of its divisors is an integer number (30856984).

Almost surely, 2^123401749 is an apocalyptic number.

It is an amenable number.

123401749 is a deficient number, since it is larger than the sum of its proper divisors (26187).

123401749 is an equidigital number, since it uses as much as digits as its factorization.

123401749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26186.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 123401749 is about 11108.6339844285. The cubic root of 123401749 is about 497.8598512633.

The spelling of 123401749 in words is "one hundred twenty-three million, four hundred one thousand, seven hundred forty-nine".