420000077 has 4 divisors (see below), whose sum is σ = 480000096. Its totient is φ = 360000060.

The previous prime is 420000029. The next prime is 420000101. The reversal of 420000077 is 770000024.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 420000077 - 2²² = 415805773 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420008077) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29999999 + ... + 30000012.

It is an arithmetic number, because the mean of its divisors is an integer number (120000024).

Almost surely, 2^420000077 is an apocalyptic number.

It is an amenable number.

420000077 is a deficient number, since it is larger than the sum of its proper divisors (60000019).

420000077 is an equidigital number, since it uses as much as digits as its factorization.

420000077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60000018.

The product of its (nonzero) digits is 392, while the sum is 20.

The square root of 420000077 is about 20493.9034105268. The cubic root of 420000077 is about 748.8872844872.

The spelling of 420000077 in words is "four hundred twenty million, seventy-seven", and thus it is an aban number.