70742447 has 2 divisors, whose sum is σ = 70742448. Its totient is φ = 70742446.

The previous prime is 70742437. The next prime is 70742449. The reversal of 70742447 is 74424707.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 70742447 - 2⁴ = 70742431 is a prime.

Together with 70742449, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70742449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35371223 + 35371224.

It is an arithmetic number, because the mean of its divisors is an integer number (35371224).

Almost surely, 2^70742447 is an apocalyptic number.

70742447 is a deficient number, since it is larger than the sum of its proper divisors (1).

70742447 is an equidigital number, since it uses as much as digits as its factorization.

70742447 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43904, while the sum is 35.

The square root of 70742447 is about 8410.8529294002. The cubic root of 70742447 is about 413.5804734430.

The spelling of 70742447 in words is "seventy million, seven hundred forty-two thousand, four hundred forty-seven".