123722704531 has 4 divisors (see below), whose sum is σ = 123886143472. Its totient is φ = 123559265592.

The previous prime is 123722704517. The next prime is 123722704559. The reversal of 123722704531 is 135407227321.

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

It is a cyclic number.

It is not a de Polignac number, because 123722704531 - 2³¹ = 121575220883 is a prime.

It is a super-2 number, since 2×123722704531² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123722704561) 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, 81718335 + ... + 81719848.

It is an arithmetic number, because the mean of its divisors is an integer number (30971535868).

Almost surely, 2^123722704531 is an apocalyptic number.

123722704531 is a deficient number, since it is larger than the sum of its proper divisors (163438941).

123722704531 is an equidigital number, since it uses as much as digits as its factorization.

123722704531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163438940.

The product of its (nonzero) digits is 70560, while the sum is 37.

The spelling of 123722704531 in words is "one hundred twenty-three billion, seven hundred twenty-two million, seven hundred four thousand, five hundred thirty-one".