77434213 has 4 divisors (see below), whose sum is σ = 77522400. Its totient is φ = 77346028.

The previous prime is 77434211. The next prime is 77434223. The reversal of 77434213 is 31243477.

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, and also an emirpimes, since its reverse is a distinct semiprime: 31243477 = 1193 ⋅26189.

It is a cyclic number.

It is not a de Polignac number, because 77434213 - 2¹ = 77434211 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 (77434211) 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, 42763 + ... + 44536.

It is an arithmetic number, because the mean of its divisors is an integer number (19380600).

Almost surely, 2^77434213 is an apocalyptic number.

It is an amenable number.

77434213 is a deficient number, since it is larger than the sum of its proper divisors (88187).

77434213 is an equidigital number, since it uses as much as digits as its factorization.

77434213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88186.

The product of its digits is 14112, while the sum is 31.

The square root of 77434213 is about 8799.6711870388. The cubic root of 77434213 is about 426.2302769488.

The spelling of 77434213 in words is "seventy-seven million, four hundred thirty-four thousand, two hundred thirteen".