420329997 has 6 divisors (see below), whose sum is σ = 607143342. Its totient is φ = 280219992.

The previous prime is 420329993. The next prime is 420329999. The reversal of 420329997 is 799923024.

It can be written as a sum of positive squares in only one way, i.e., 252523881 + 167806116 = 15891^2 + 12954^2 .

It is not a de Polignac number, because 420329997 - 2² = 420329993 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420329993) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 23351658 + ... + 23351675.

It is an arithmetic number, because the mean of its divisors is an integer number (101190557).

Almost surely, 2^420329997 is an apocalyptic number.

It is an amenable number.

420329997 is a deficient number, since it is larger than the sum of its proper divisors (186813345).

420329997 is a wasteful number, since it uses less digits than its factorization.

420329997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46703339 (or 46703336 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 45.

The square root of 420329997 is about 20501.9510534973. The cubic root of 420329997 is about 749.0833227268.

The spelling of 420329997 in words is "four hundred twenty million, three hundred twenty-nine thousand, nine hundred ninety-seven".