100790321 has 2 divisors, whose sum is σ = 100790322. Its totient is φ = 100790320.

The previous prime is 100790317. The next prime is 100790329. The reversal of 100790321 is 123097001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 100000000 + 790321 = 10000^2 + 889^2 .

It is a cyclic number.

It is not a de Polignac number, because 100790321 - 2² = 100790317 is a prime.

It is not a weakly prime, because it can be changed into another prime (100790329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50395160 + 50395161.

It is an arithmetic number, because the mean of its divisors is an integer number (50395161).

Almost surely, 2^100790321 is an apocalyptic number.

It is an amenable number.

100790321 is a deficient number, since it is larger than the sum of its proper divisors (1).

100790321 is an equidigital number, since it uses as much as digits as its factorization.

100790321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 378, while the sum is 23.

The square root of 100790321 is about 10039.4382810992. The cubic root of 100790321 is about 465.3784578402.

It can be divided in two parts, 100 and 790321, that multiplied together give a square (79032100 = 8890²).

The spelling of 100790321 in words is "one hundred million, seven hundred ninety thousand, three hundred twenty-one".