420726739 has 2 divisors, whose sum is σ = 420726740. Its totient is φ = 420726738.

The previous prime is 420726731. The next prime is 420726769. The reversal of 420726739 is 937627024.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 420726739 - 2³ = 420726731 is a prime.

It is not a weakly prime, because it can be changed into another prime (420726731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210363369 + 210363370.

It is an arithmetic number, because the mean of its divisors is an integer number (210363370).

Almost surely, 2^420726739 is an apocalyptic number.

420726739 is a deficient number, since it is larger than the sum of its proper divisors (1).

420726739 is an equidigital number, since it uses as much as digits as its factorization.

420726739 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 127008, while the sum is 40.

The square root of 420726739 is about 20511.6244846672. The cubic root of 420726739 is about 749.3189307505.

The spelling of 420726739 in words is "four hundred twenty million, seven hundred twenty-six thousand, seven hundred thirty-nine".