212933977 has 4 divisors (see below), whose sum is σ = 222192000. Its totient is φ = 203675956.

The previous prime is 212933953. The next prime is 212933999. The reversal of 212933977 is 779339212.

212933977 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 a de Polignac number, because none of the positive numbers 2^k-212933977 is a prime.

It is a super-2 number, since 2×212933977² = 90681757122073058, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212933477) 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, 4628977 + ... + 4629022.

It is an arithmetic number, because the mean of its divisors is an integer number (55548000).

Almost surely, 2^212933977 is an apocalyptic number.

It is an amenable number.

212933977 is a deficient number, since it is larger than the sum of its proper divisors (9258023).

212933977 is an equidigital number, since it uses as much as digits as its factorization.

212933977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9258022.

The product of its digits is 142884, while the sum is 43.

The square root of 212933977 is about 14592.2574333103. The cubic root of 212933977 is about 597.1475505245.

The spelling of 212933977 in words is "two hundred twelve million, nine hundred thirty-three thousand, nine hundred seventy-seven".