212662749 has 8 divisors (see below), whose sum is σ = 305361952. Its totient is φ = 130869360.

The previous prime is 212662739. The next prime is 212662781. The reversal of 212662749 is 947266212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 212662749 - 2⁷ = 212662621 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 5452891 = 212662749 / (2 + 1 + 2 + 6 + 6 + 2 + 7 + 4 + 9).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212662729) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2726407 + ... + 2726484.

It is an arithmetic number, because the mean of its divisors is an integer number (38170244).

Almost surely, 2^212662749 is an apocalyptic number.

It is an amenable number.

212662749 is a deficient number, since it is larger than the sum of its proper divisors (92699203).

212662749 is a wasteful number, since it uses less digits than its factorization.

212662749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5452907.

The product of its digits is 72576, while the sum is 39.

The square root of 212662749 is about 14582.9609133399. The cubic root of 212662749 is about 596.8939007711.

The spelling of 212662749 in words is "two hundred twelve million, six hundred sixty-two thousand, seven hundred forty-nine".