230778479 has 2 divisors, whose sum is σ = 230778480. Its totient is φ = 230778478.

The previous prime is 230778473. The next prime is 230778511. The reversal of 230778479 is 974877032.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-230778479 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 (230778473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115389239 + 115389240.

It is an arithmetic number, because the mean of its divisors is an integer number (115389240).

Almost surely, 2^230778479 is an apocalyptic number.

230778479 is a deficient number, since it is larger than the sum of its proper divisors (1).

230778479 is an equidigital number, since it uses as much as digits as its factorization.

230778479 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 592704, while the sum is 47.

The square root of 230778479 is about 15191.3948997451. The cubic root of 230778479 is about 613.3830474891.

The spelling of 230778479 in words is "two hundred thirty million, seven hundred seventy-eight thousand, four hundred seventy-nine".