903420121 has 2 divisors, whose sum is σ = 903420122. Its totient is φ = 903420120.

The previous prime is 903420101. The next prime is 903420173. The reversal of 903420121 is 121024309.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 838392025 + 65028096 = 28955^2 + 8064^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-903420121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 903420092 and 903420101.

It is not a weakly prime, because it can be changed into another prime (903420101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 451710060 + 451710061.

It is an arithmetic number, because the mean of its divisors is an integer number (451710061).

Almost surely, 2^903420121 is an apocalyptic number.

It is an amenable number.

903420121 is a deficient number, since it is larger than the sum of its proper divisors (1).

903420121 is an equidigital number, since it uses as much as digits as its factorization.

903420121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 903420121 is about 30056.9479654871. The cubic root of 903420121 is about 966.7108351730.

The spelling of 903420121 in words is "nine hundred three million, four hundred twenty thousand, one hundred twenty-one".