212769399 has 32 divisors (see below), whose sum is σ = 315463680. Its totient is φ = 126950400.

The previous prime is 212769379. The next prime is 212769409. The reversal of 212769399 is 993967212.

It is not a de Polignac number, because 212769399 - 2¹⁵ = 212736631 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212769379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 92139 + ... + 94419.

It is an arithmetic number, because the mean of its divisors is an integer number (9858240).

Almost surely, 2^212769399 is an apocalyptic number.

212769399 is a deficient number, since it is larger than the sum of its proper divisors (102694281).

212769399 is a wasteful number, since it uses less digits than its factorization.

212769399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2391.

The product of its digits is 367416, while the sum is 48.

The square root of 212769399 is about 14586.6171198123. The cubic root of 212769399 is about 596.9936645147.

The spelling of 212769399 in words is "two hundred twelve million, seven hundred sixty-nine thousand, three hundred ninety-nine".