84020351 has 2 divisors, whose sum is σ = 84020352. Its totient is φ = 84020350.

The previous prime is 84020297. The next prime is 84020369. The reversal of 84020351 is 15302048.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84020351 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84020551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42010175 + 42010176.

It is an arithmetic number, because the mean of its divisors is an integer number (42010176).

Almost surely, 2^84020351 is an apocalyptic number.

84020351 is a deficient number, since it is larger than the sum of its proper divisors (1).

84020351 is an equidigital number, since it uses as much as digits as its factorization.

84020351 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 84020351 is about 9166.2615607455. The cubic root of 84020351 is about 437.9872792258.

Adding to 84020351 its reverse (15302048), we get a palindrome (99322399).

The spelling of 84020351 in words is "eighty-four million, twenty thousand, three hundred fifty-one".