104721031 has 4 divisors (see below), whose sum is σ = 104880600. Its totient is φ = 104561464.

The previous prime is 104720999. The next prime is 104721053. The reversal of 104721031 is 130127401.

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 104721031 - 2⁵ = 104720999 is a prime.

It is a super-2 number, since 2×104721031² = 21932988667405922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (104721061) 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, 78796 + ... + 80113.

It is an arithmetic number, because the mean of its divisors is an integer number (26220150).

Almost surely, 2^104721031 is an apocalyptic number.

104721031 is a deficient number, since it is larger than the sum of its proper divisors (159569).

104721031 is an equidigital number, since it uses as much as digits as its factorization.

104721031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159568.

The product of its (nonzero) digits is 168, while the sum is 19.

The square root of 104721031 is about 10233.3294191089. The cubic root of 104721031 is about 471.3512210012.

Adding to 104721031 its reverse (130127401), we get a palindrome (234848432).

The spelling of 104721031 in words is "one hundred four million, seven hundred twenty-one thousand, thirty-one".