70909001 has 4 divisors (see below), whose sum is σ = 70928004. Its totient is φ = 70890000.

The previous prime is 70908991. The next prime is 70909009. The reversal of 70909001 is 10090907.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10090907 = 79 ⋅127733.

It can be written as a sum of positive squares in 2 ways, for example, as 20839225 + 50069776 = 4565^2 + 7076^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-70909001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70909009) 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, 1850 + ... + 12051.

It is an arithmetic number, because the mean of its divisors is an integer number (17732001).

Almost surely, 2^70909001 is an apocalyptic number.

It is an amenable number.

70909001 is a deficient number, since it is larger than the sum of its proper divisors (19003).

70909001 is a wasteful number, since it uses less digits than its factorization.

70909001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19002.

The product of its (nonzero) digits is 567, while the sum is 26.

The square root of 70909001 is about 8420.7482446633. The cubic root of 70909001 is about 413.9047930775.

Adding to 70909001 its reverse (10090907), we get a palindrome (80999908).

The spelling of 70909001 in words is "seventy million, nine hundred nine thousand, one".