213672077 has 8 divisors (see below), whose sum is σ = 219970296. Its totient is φ = 207401472.

The previous prime is 213672059. The next prime is 213672079. The reversal of 213672077 is 770276312.

It can be written as a sum of positive squares in 4 ways, for example, as 16859236 + 196812841 = 4106^2 + 14029^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 213672077 - 2⁶ = 213672013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213672079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9353 + ... + 22689.

It is an arithmetic number, because the mean of its divisors is an integer number (27496287).

Almost surely, 2^213672077 is an apocalyptic number.

It is an amenable number.

213672077 is a deficient number, since it is larger than the sum of its proper divisors (6298219).

213672077 is a wasteful number, since it uses less digits than its factorization.

213672077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13807.

The product of its (nonzero) digits is 24696, while the sum is 35.

The square root of 213672077 is about 14617.5263639235. The cubic root of 213672077 is about 597.8367255203.

The spelling of 213672077 in words is "two hundred thirteen million, six hundred seventy-two thousand, seventy-seven".