84721077 has 12 divisors (see below), whose sum is σ = 139857120. Its totient is φ = 48412008.

The previous prime is 84721073. The next prime is 84721079. The reversal of 84721077 is 77012748.

It is not a de Polignac number, because 84721077 - 2² = 84721073 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84721073) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 672327 + ... + 672452.

It is an arithmetic number, because the mean of its divisors is an integer number (11654760).

Almost surely, 2^84721077 is an apocalyptic number.

It is an amenable number.

84721077 is a deficient number, since it is larger than the sum of its proper divisors (55136043).

84721077 is a wasteful number, since it uses less digits than its factorization.

84721077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1344792 (or 1344789 counting only the distinct ones).

The product of its (nonzero) digits is 21952, while the sum is 36.

The square root of 84721077 is about 9204.4053039835. The cubic root of 84721077 is about 439.2015080771.

The spelling of 84721077 in words is "eighty-four million, seven hundred twenty-one thousand, seventy-seven".