70724705 has 4 divisors (see below), whose sum is σ = 84869652. Its totient is φ = 56579760.

The previous prime is 70724699. The next prime is 70724711. The reversal of 70724705 is 50742707.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50742707 = 41 ⋅1237627.

It is an interprime number because it is at equal distance from previous prime (70724699) and next prime (70724711).

It can be written as a sum of positive squares in 2 ways, for example, as 15311569 + 55413136 = 3913^2 + 7444^2 .

It is not a de Polignac number, because 70724705 - 2¹² = 70720609 is a prime.

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, 7072466 + ... + 7072475.

It is an arithmetic number, because the mean of its divisors is an integer number (21217413).

Almost surely, 2^70724705 is an apocalyptic number.

It is an amenable number.

70724705 is a deficient number, since it is larger than the sum of its proper divisors (14144947).

70724705 is a wasteful number, since it uses less digits than its factorization.

70724705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14144946.

The product of its (nonzero) digits is 13720, while the sum is 32.

The square root of 70724705 is about 8409.7981545338. The cubic root of 70724705 is about 413.5458956254.

The spelling of 70724705 in words is "seventy million, seven hundred twenty-four thousand, seven hundred five".