213928477 has 8 divisors (see below), whose sum is σ = 244688576. Its totient is φ = 183218112.

The previous prime is 213928439. The next prime is 213928501. The reversal of 213928477 is 774829312.

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

It is not a de Polignac number, because 213928477 - 2²³ = 205539869 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 (213928777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2703 + ... + 20860.

It is an arithmetic number, because the mean of its divisors is an integer number (30586072).

Almost surely, 2^213928477 is an apocalyptic number.

It is an amenable number.

213928477 is a deficient number, since it is larger than the sum of its proper divisors (30760099).

213928477 is a wasteful number, since it uses less digits than its factorization.

213928477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24867.

The product of its digits is 169344, while the sum is 43.

The square root of 213928477 is about 14626.2940282219. The cubic root of 213928477 is about 598.0757585701.

The spelling of 213928477 in words is "two hundred thirteen million, nine hundred twenty-eight thousand, four hundred seventy-seven".