420011957 has 2 divisors, whose sum is σ = 420011958. Its totient is φ = 420011956.

The previous prime is 420011939. The next prime is 420011981. The reversal of 420011957 is 759110024.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 420004036 + 7921 = 20494^2 + 89^2 .

It is a cyclic number.

It is not a de Polignac number, because 420011957 - 2¹⁰ = 420010933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420001957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210005978 + 210005979.

It is an arithmetic number, because the mean of its divisors is an integer number (210005979).

Almost surely, 2^420011957 is an apocalyptic number.

It is an amenable number.

420011957 is a deficient number, since it is larger than the sum of its proper divisors (1).

420011957 is an equidigital number, since it uses as much as digits as its factorization.

420011957 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2520, while the sum is 29.

The square root of 420011957 is about 20494.1932507723. The cubic root of 420011957 is about 748.8943453566.

The spelling of 420011957 in words is "four hundred twenty million, eleven thousand, nine hundred fifty-seven".