84709551 has 16 divisors (see below), whose sum is σ = 118258560. Its totient is φ = 53864160.

The previous prime is 84709517. The next prime is 84709561. The reversal of 84709551 is 15590748.

It is not a de Polignac number, because 84709551 - 2¹³ = 84701359 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84709501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1356 + ... + 13086.

It is an arithmetic number, because the mean of its divisors is an integer number (7391160).

Almost surely, 2^84709551 is an apocalyptic number.

84709551 is a deficient number, since it is larger than the sum of its proper divisors (33549009).

84709551 is a wasteful number, since it uses less digits than its factorization.

84709551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11846.

The product of its (nonzero) digits is 50400, while the sum is 39.

The square root of 84709551 is about 9203.7791694499. The cubic root of 84709551 is about 439.1815899082.

The spelling of 84709551 in words is "eighty-four million, seven hundred nine thousand, five hundred fifty-one".