84900578831 has 2 divisors, whose sum is σ = 84900578832. Its totient is φ = 84900578830.

The previous prime is 84900578797. The next prime is 84900578897. The reversal of 84900578831 is 13887500948.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 84900578831 - 2⁶ = 84900578767 is a prime.

It is a super-2 number, since 2×84900578831² (a number of 23 digits) 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 (84900578731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42450289415 + 42450289416.

It is an arithmetic number, because the mean of its divisors is an integer number (42450289416).

Almost surely, 2^84900578831 is an apocalyptic number.

84900578831 is a deficient number, since it is larger than the sum of its proper divisors (1).

84900578831 is an equidigital number, since it uses as much as digits as its factorization.

84900578831 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1935360, while the sum is 53.

The spelling of 84900578831 in words is "eighty-four billion, nine hundred million, five hundred seventy-eight thousand, eight hundred thirty-one".