434590921 has 2 divisors, whose sum is σ = 434590922. Its totient is φ = 434590920.

The previous prime is 434590903. The next prime is 434590927. The reversal of 434590921 is 129095434.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 427000896 + 7590025 = 20664^2 + 2755^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-434590921 is a prime.

It is not a weakly prime, because it can be changed into another prime (434590927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 217295460 + 217295461.

It is an arithmetic number, because the mean of its divisors is an integer number (217295461).

Almost surely, 2^434590921 is an apocalyptic number.

It is an amenable number.

434590921 is a deficient number, since it is larger than the sum of its proper divisors (1).

434590921 is an equidigital number, since it uses as much as digits as its factorization.

434590921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 434590921 is about 20846.8443894993. The cubic root of 434590921 is about 757.4608945527.

It can be divided in two parts, 4345 and 90921, that added together give a triangular number (95266 = T₄₃₆).

The spelling of 434590921 in words is "four hundred thirty-four million, five hundred ninety thousand, nine hundred twenty-one".