214981769 has 4 divisors (see below), whose sum is σ = 216107520. Its totient is φ = 213856020.

The previous prime is 214981757. The next prime is 214981771. The reversal of 214981769 is 967189412.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-214981769 is a prime.

It is a super-2 number, since 2×214981769² = 92434322004738722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (214980769) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 562589 + ... + 562970.

It is an arithmetic number, because the mean of its divisors is an integer number (54026880).

Almost surely, 2^214981769 is an apocalyptic number.

It is an amenable number.

214981769 is a deficient number, since it is larger than the sum of its proper divisors (1125751).

214981769 is a wasteful number, since it uses less digits than its factorization.

214981769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1125750.

The product of its digits is 217728, while the sum is 47.

The square root of 214981769 is about 14662.2566134958. The cubic root of 214981769 is about 599.0557081530.

The spelling of 214981769 in words is "two hundred fourteen million, nine hundred eighty-one thousand, seven hundred sixty-nine".