212753977 has 2 divisors, whose sum is σ = 212753978. Its totient is φ = 212753976.

The previous prime is 212753969. The next prime is 212753987. The reversal of 212753977 is 779357212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 193182201 + 19571776 = 13899^2 + 4424^2 .

It is a cyclic number.

It is not a de Polignac number, because 212753977 - 2³ = 212753969 is a prime.

It is not a weakly prime, because it can be changed into another prime (212753917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106376988 + 106376989.

It is an arithmetic number, because the mean of its divisors is an integer number (106376989).

Almost surely, 2^212753977 is an apocalyptic number.

It is an amenable number.

212753977 is a deficient number, since it is larger than the sum of its proper divisors (1).

212753977 is an equidigital number, since it uses as much as digits as its factorization.

212753977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 185220, while the sum is 43.

The square root of 212753977 is about 14586.0884749819. The cubic root of 212753977 is about 596.9792403560.

It can be divided in two parts, 21275 and 3977, that added together give a palindrome (25252).

The spelling of 212753977 in words is "two hundred twelve million, seven hundred fifty-three thousand, nine hundred seventy-seven".