421041977 has 2 divisors, whose sum is σ = 421041978. Its totient is φ = 421041976.

The previous prime is 421041961. The next prime is 421042049. The reversal of 421041977 is 779140124.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 411927616 + 9114361 = 20296^2 + 3019^2 .

It is a cyclic number.

It is not a de Polignac number, because 421041977 - 2⁴ = 421041961 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (421041917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210520988 + 210520989.

It is an arithmetic number, because the mean of its divisors is an integer number (210520989).

Almost surely, 2^421041977 is an apocalyptic number.

It is an amenable number.

421041977 is a deficient number, since it is larger than the sum of its proper divisors (1).

421041977 is an equidigital number, since it uses as much as digits as its factorization.

421041977 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14112, while the sum is 35.

The square root of 421041977 is about 20519.3074200861. The cubic root of 421041977 is about 749.5060314723.

The spelling of 421041977 in words is "four hundred twenty-one million, forty-one thousand, nine hundred seventy-seven".