902107421 has 2 divisors, whose sum is σ = 902107422. Its totient is φ = 902107420.

The previous prime is 902107387. The next prime is 902107429. The reversal of 902107421 is 124701209.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 841812196 + 60295225 = 29014^2 + 7765^2 .

It is a cyclic number.

It is not a de Polignac number, because 902107421 - 2¹⁰ = 902106397 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (902107429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 451053710 + 451053711.

It is an arithmetic number, because the mean of its divisors is an integer number (451053711).

Almost surely, 2^902107421 is an apocalyptic number.

It is an amenable number.

902107421 is a deficient number, since it is larger than the sum of its proper divisors (1).

902107421 is an equidigital number, since it uses as much as digits as its factorization.

902107421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 902107421 is about 30035.1031461522. The cubic root of 902107421 is about 966.2423870264.

The spelling of 902107421 in words is "nine hundred two million, one hundred seven thousand, four hundred twenty-one".