723150121 has 4 divisors (see below), whose sum is σ = 732304000. Its totient is φ = 713996244.

The previous prime is 723150091. The next prime is 723150133. The reversal of 723150121 is 121051327.

It is a happy number.

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 723150121 - 2⁷ = 723149993 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 723150092 and 723150101.

It is not an unprimeable number, because it can be changed into a prime (723150151) 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, 4576821 + ... + 4576978.

It is an arithmetic number, because the mean of its divisors is an integer number (183076000).

Almost surely, 2^723150121 is an apocalyptic number.

It is an amenable number.

723150121 is a deficient number, since it is larger than the sum of its proper divisors (9153879).

723150121 is an equidigital number, since it uses as much as digits as its factorization.

723150121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9153878.

The product of its (nonzero) digits is 420, while the sum is 22.

The square root of 723150121 is about 26891.4507046385. The cubic root of 723150121 is about 897.5861742247.

The spelling of 723150121 in words is "seven hundred twenty-three million, one hundred fifty thousand, one hundred twenty-one".