742278479 has 2 divisors, whose sum is σ = 742278480. Its totient is φ = 742278478.

The previous prime is 742278437. The next prime is 742278499. The reversal of 742278479 is 974872247.

It is a strong prime.

It is an emirp because it is prime and its reverse (974872247) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-742278479 is a prime.

It is a Sophie Germain 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 (742278499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 371139239 + 371139240.

It is an arithmetic number, because the mean of its divisors is an integer number (371139240).

Almost surely, 2^742278479 is an apocalyptic number.

742278479 is a deficient number, since it is larger than the sum of its proper divisors (1).

742278479 is an equidigital number, since it uses as much as digits as its factorization.

742278479 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1580544, while the sum is 50.

The square root of 742278479 is about 27244.7881070857. The cubic root of 742278479 is about 905.4315490137.

The spelling of 742278479 in words is "seven hundred forty-two million, two hundred seventy-eight thousand, four hundred seventy-nine".