420780997 has 8 divisors (see below), whose sum is σ = 517884416. Its totient is φ = 332925552.

The previous prime is 420780959. The next prime is 420781007. The reversal of 420780997 is 799087024.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 420780997 - 2¹¹ = 420778949 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420780907) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2311893 + ... + 2312074.

It is an arithmetic number, because the mean of its divisors is an integer number (64735552).

Almost surely, 2^420780997 is an apocalyptic number.

It is an amenable number.

420780997 is a deficient number, since it is larger than the sum of its proper divisors (97103419).

420780997 is a wasteful number, since it uses less digits than its factorization.

420780997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4623987.

The product of its (nonzero) digits is 254016, while the sum is 46.

The square root of 420780997 is about 20512.9470578949. The cubic root of 420780997 is about 749.3511407300.

The spelling of 420780997 in words is "four hundred twenty million, seven hundred eighty thousand, nine hundred ninety-seven".