421354074077 has 2 divisors, whose sum is σ = 421354074078. Its totient is φ = 421354074076.

The previous prime is 421354074023. The next prime is 421354074109. The reversal of 421354074077 is 770470453124.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 392190315001 + 29163759076 = 626251^2 + 170774^2 .

It is a cyclic number.

It is not a de Polignac number, because 421354074077 - 2¹⁶ = 421354008541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421354074377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210677037038 + 210677037039.

It is an arithmetic number, because the mean of its divisors is an integer number (210677037039).

Almost surely, 2^421354074077 is an apocalyptic number.

It is an amenable number.

421354074077 is a deficient number, since it is larger than the sum of its proper divisors (1).

421354074077 is an equidigital number, since it uses as much as digits as its factorization.

421354074077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 658560, while the sum is 44.

The spelling of 421354074077 in words is "four hundred twenty-one billion, three hundred fifty-four million, seventy-four thousand, seventy-seven".