420491739 has 16 divisors (see below), whose sum is σ = 564460160. Its totient is φ = 278432640.

The previous prime is 420491737. The next prime is 420491741. The reversal of 420491739 is 937194024.

It is an interprime number because it is at equal distance from previous prime (420491737) and next prime (420491741).

It is not a de Polignac number, because 420491739 - 2¹ = 420491737 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 420491697 and 420491706.

It is not an unprimeable number, because it can be changed into a prime (420491737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 533904 + ... + 534690.

It is an arithmetic number, because the mean of its divisors is an integer number (35278760).

Almost surely, 2^420491739 is an apocalyptic number.

420491739 is a deficient number, since it is larger than the sum of its proper divisors (143968421).

420491739 is a wasteful number, since it uses less digits than its factorization.

420491739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1770.

The product of its (nonzero) digits is 54432, while the sum is 39.

The square root of 420491739 is about 20505.8952255199. The cubic root of 420491739 is about 749.1793922425.

The spelling of 420491739 in words is "four hundred twenty million, four hundred ninety-one thousand, seven hundred thirty-nine".