70640105 has 4 divisors (see below), whose sum is σ = 84768132. Its totient is φ = 56512080.

The previous prime is 70640093. The next prime is 70640111. The reversal of 70640105 is 50104607.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16999129 + 53640976 = 4123^2 + 7324^2 .

It is not a de Polignac number, because 70640105 - 2¹² = 70636009 is a prime.

It is a super-2 number, since 2×70640105² = 9980048868822050, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7064006 + ... + 7064015.

It is an arithmetic number, because the mean of its divisors is an integer number (21192033).

Almost surely, 2^70640105 is an apocalyptic number.

It is an amenable number.

70640105 is a deficient number, since it is larger than the sum of its proper divisors (14128027).

70640105 is a wasteful number, since it uses less digits than its factorization.

70640105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14128026.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 70640105 is about 8404.7668022379. The cubic root of 70640105 is about 413.3809370395.

The spelling of 70640105 in words is "seventy million, six hundred forty thousand, one hundred five".