70347457 has 4 divisors (see below), whose sum is σ = 71500756. Its totient is φ = 69194160.

The previous prime is 70347449. The next prime is 70347517. The reversal of 70347457 is 75474307.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 75474307 = 83 ⋅909329.

It can be written as a sum of positive squares in 2 ways, for example, as 16192576 + 54154881 = 4024^2 + 7359^2 .

It is a cyclic number.

It is not a de Polignac number, because 70347457 - 2³ = 70347449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70347437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 576558 + ... + 576679.

It is an arithmetic number, because the mean of its divisors is an integer number (17875189).

Almost surely, 2^70347457 is an apocalyptic number.

It is an amenable number.

70347457 is a deficient number, since it is larger than the sum of its proper divisors (1153299).

70347457 is a wasteful number, since it uses less digits than its factorization.

70347457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1153298.

The product of its (nonzero) digits is 82320, while the sum is 37.

The square root of 70347457 is about 8387.3390893656. The cubic root of 70347457 is about 412.8092950585.

The spelling of 70347457 in words is "seventy million, three hundred forty-seven thousand, four hundred fifty-seven".