212345677 has 4 divisors (see below), whose sum is σ = 213617376. Its totient is φ = 211073980.

The previous prime is 212345669. The next prime is 212345699. The reversal of 212345677 is 776543212.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 212345677 - 2³ = 212345669 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 (212345647) 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, 635599 + ... + 635932.

It is an arithmetic number, because the mean of its divisors is an integer number (53404344).

Almost surely, 2^212345677 is an apocalyptic number.

It is an amenable number.

212345677 is a deficient number, since it is larger than the sum of its proper divisors (1271699).

212345677 is a wasteful number, since it uses less digits than its factorization.

212345677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1271698.

The product of its digits is 70560, while the sum is 37.

The square root of 212345677 is about 14572.0855405120. The cubic root of 212345677 is about 596.5971045829.

Adding to 212345677 its reverse (776543212), we get a palindrome (988888889).

The spelling of 212345677 in words is "two hundred twelve million, three hundred forty-five thousand, six hundred seventy-seven".