421746177653 has 2 divisors, whose sum is σ = 421746177654. Its totient is φ = 421746177652.

The previous prime is 421746177607. The next prime is 421746177673. The reversal of 421746177653 is 356771647124.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 212781083524 + 208965094129 = 461282^2 + 457127^2 .

It is a cyclic number.

It is not a de Polignac number, because 421746177653 - 2³² = 417451210357 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 421746177595 and 421746177604.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421746177673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210873088826 + 210873088827.

It is an arithmetic number, because the mean of its divisors is an integer number (210873088827).

Almost surely, 2^421746177653 is an apocalyptic number.

It is an amenable number.

421746177653 is a deficient number, since it is larger than the sum of its proper divisors (1).

421746177653 is an equidigital number, since it uses as much as digits as its factorization.

421746177653 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5927040, while the sum is 53.

The spelling of 421746177653 in words is "four hundred twenty-one billion, seven hundred forty-six million, one hundred seventy-seven thousand, six hundred fifty-three".