84377479 has 2 divisors, whose sum is σ = 84377480. Its totient is φ = 84377478.

The previous prime is 84377473. The next prime is 84377483. The reversal of 84377479 is 97477348.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84377479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84377473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42188739 + 42188740.

It is an arithmetic number, because the mean of its divisors is an integer number (42188740).

Almost surely, 2^84377479 is an apocalyptic number.

84377479 is a deficient number, since it is larger than the sum of its proper divisors (1).

84377479 is an equidigital number, since it uses as much as digits as its factorization.

84377479 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1185408, while the sum is 49.

The square root of 84377479 is about 9185.7214741141. The cubic root of 84377479 is about 438.6069561802.

The spelling of 84377479 in words is "eighty-four million, three hundred seventy-seven thousand, four hundred seventy-nine".