213694761 has 8 divisors (see below), whose sum is σ = 325630144. Its totient is φ = 122111280.

The previous prime is 213694751. The next prime is 213694769. The reversal of 213694761 is 167496312.

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

It is not a de Polignac number, because 213694761 - 2¹³ = 213686569 is a prime.

It is not an unprimeable number, because it can be changed into a prime (213694769) 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, 5087950 + ... + 5087991.

It is an arithmetic number, because the mean of its divisors is an integer number (40703768).

Almost surely, 2^213694761 is an apocalyptic number.

213694761 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

213694761 is a deficient number, since it is larger than the sum of its proper divisors (111935383).

213694761 is a wasteful number, since it uses less digits than its factorization.

213694761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10175951.

The product of its digits is 54432, while the sum is 39.

The square root of 213694761 is about 14618.3022612067. The cubic root of 213694761 is about 597.8578807544.

The spelling of 213694761 in words is "two hundred thirteen million, six hundred ninety-four thousand, seven hundred sixty-one".