213769491 has 16 divisors (see below), whose sum is σ = 307739040. Its totient is φ = 131212800.

The previous prime is 213769483. The next prime is 213769499. The reversal of 213769491 is 194967312.

It is an interprime number because it is at equal distance from previous prime (213769483) and next prime (213769499).

It is not a de Polignac number, because 213769491 - 2³ = 213769483 is a prime.

It is not an unprimeable number, because it can be changed into a prime (213769499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8805 + ... + 22473.

It is an arithmetic number, because the mean of its divisors is an integer number (19233690).

Almost surely, 2^213769491 is an apocalyptic number.

213769491 is a deficient number, since it is larger than the sum of its proper divisors (93969549).

213769491 is a wasteful number, since it uses less digits than its factorization.

213769491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14086.

The product of its digits is 81648, while the sum is 42.

The square root of 213769491 is about 14620.8580801538. The cubic root of 213769491 is about 597.9275638110.

The spelling of 213769491 in words is "two hundred thirteen million, seven hundred sixty-nine thousand, four hundred ninety-one".