900103621 has 2 divisors, whose sum is σ = 900103622. Its totient is φ = 900103620.

The previous prime is 900103577. The next prime is 900103637. The reversal of 900103621 is 126301009.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 897002500 + 3101121 = 29950^2 + 1761^2 .

It is an emirp because it is prime and its reverse (126301009) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 900103621 - 2⁷ = 900103493 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 900103592 and 900103601.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (900133621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 450051810 + 450051811.

It is an arithmetic number, because the mean of its divisors is an integer number (450051811).

Almost surely, 2^900103621 is an apocalyptic number.

It is an amenable number.

900103621 is a deficient number, since it is larger than the sum of its proper divisors (1).

900103621 is an equidigital number, since it uses as much as digits as its factorization.

900103621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 900103621 is about 30001.7269669598. The cubic root of 900103621 is about 965.5264368783.

The spelling of 900103621 in words is "nine hundred million, one hundred three thousand, six hundred twenty-one".