420042977 has 2 divisors, whose sum is σ = 420042978. Its totient is φ = 420042976.

The previous prime is 420042869. The next prime is 420043003. The reversal of 420042977 is 779240024.

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., 311028496 + 109014481 = 17636^2 + 10441^2 .

It is a cyclic number.

It is not a de Polignac number, because 420042977 - 2¹² = 420038881 is a prime.

It is a super-2 number, since 2×420042977² = 352872205054045058, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (420042677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210021488 + 210021489.

It is an arithmetic number, because the mean of its divisors is an integer number (210021489).

Almost surely, 2^420042977 is an apocalyptic number.

It is an amenable number.

420042977 is a deficient number, since it is larger than the sum of its proper divisors (1).

420042977 is an equidigital number, since it uses as much as digits as its factorization.

420042977 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28224, while the sum is 35.

The square root of 420042977 is about 20494.9500365334. The cubic root of 420042977 is about 748.9127814434.

The spelling of 420042977 in words is "four hundred twenty million, forty-two thousand, nine hundred seventy-seven".