84735551 has 2 divisors, whose sum is σ = 84735552. Its totient is φ = 84735550.

The previous prime is 84735523. The next prime is 84735559. The reversal of 84735551 is 15553748.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84735551 is a prime.

It is a super-2 number, since 2×84735551² = 14360227206547202, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84735559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42367775 + 42367776.

It is an arithmetic number, because the mean of its divisors is an integer number (42367776).

Almost surely, 2^84735551 is an apocalyptic number.

84735551 is a deficient number, since it is larger than the sum of its proper divisors (1).

84735551 is an equidigital number, since it uses as much as digits as its factorization.

84735551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 84000, while the sum is 38.

The square root of 84735551 is about 9205.1915243519. The cubic root of 84735551 is about 439.2265181488.

The spelling of 84735551 in words is "eighty-four million, seven hundred thirty-five thousand, five hundred fifty-one".