212749797 has 16 divisors (see below), whose sum is σ = 308295680. Its totient is φ = 129719232.

The previous prime is 212749763. The next prime is 212749819. The reversal of 212749797 is 797947212.

It is not a de Polignac number, because 212749797 - 2¹⁰ = 212748773 is a prime.

It is a super-2 number, since 2×212749797² = 90524952247082418, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212749727) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20773 + ... + 29274.

It is an arithmetic number, because the mean of its divisors is an integer number (19268480).

Almost surely, 2^212749797 is an apocalyptic number.

It is an amenable number.

212749797 is a deficient number, since it is larger than the sum of its proper divisors (95545883).

212749797 is a wasteful number, since it uses less digits than its factorization.

212749797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50172.

The product of its digits is 444528, while the sum is 48.

The square root of 212749797 is about 14585.9451870628. The cubic root of 212749797 is about 596.9753306922.

The spelling of 212749797 in words is "two hundred twelve million, seven hundred forty-nine thousand, seven hundred ninety-seven".