84669649 has 4 divisors (see below), whose sum is σ = 87400960. Its totient is φ = 81938340.

The previous prime is 84669631. The next prime is 84669659. The reversal of 84669649 is 94696648.

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 not a de Polignac number, because 84669649 - 2⁵ = 84669617 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 84669596 and 84669605.

It is not an unprimeable number, because it can be changed into a prime (84669659) 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, 1365609 + ... + 1365670.

It is an arithmetic number, because the mean of its divisors is an integer number (21850240).

Almost surely, 2^84669649 is an apocalyptic number.

It is an amenable number.

84669649 is a deficient number, since it is larger than the sum of its proper divisors (2731311).

84669649 is a wasteful number, since it uses less digits than its factorization.

84669649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2731310.

The product of its digits is 2239488, while the sum is 52.

The square root of 84669649 is about 9201.6112176075. The cubic root of 84669649 is about 439.1126209986.

The spelling of 84669649 in words is "eighty-four million, six hundred sixty-nine thousand, six hundred forty-nine".