70291457 has 4 divisors (see below), whose sum is σ = 70697940. Its totient is φ = 69884976.

The previous prime is 70291433. The next prime is 70291483. The reversal of 70291457 is 75419207.

It is a Cunningham number, because it is equal to 8384²+1.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 75419207 = 211 ⋅357437.

It can be written as a sum of positive squares in 2 ways, for example, as 63936016 + 6355441 = 7996^2 + 2521^2 .

It is a cyclic number.

It is not a de Polignac number, because 70291457 - 2⁸ = 70291201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70291357) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 202982 + ... + 203327.

It is an arithmetic number, because the mean of its divisors is an integer number (17674485).

Almost surely, 2^70291457 is an apocalyptic number.

It is an amenable number.

70291457 is a deficient number, since it is larger than the sum of its proper divisors (406483).

70291457 is a wasteful number, since it uses less digits than its factorization.

70291457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406482.

The product of its (nonzero) digits is 17640, while the sum is 35.

The square root of 70291457 is about 8384.0000596374. Note that the first 4 decimals coincide. The cubic root of 70291457 is about 412.6997272154.

The spelling of 70291457 in words is "seventy million, two hundred ninety-one thousand, four hundred fifty-seven".