70351091 has 4 divisors (see below), whose sum is σ = 74053800. Its totient is φ = 66648384.

The previous prime is 70351081. The next prime is 70351103. The reversal of 70351091 is 19015307.

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

It is a cyclic number.

It is not a de Polignac number, because 70351091 - 2⁶ = 70351027 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 70351091.

It is not an unprimeable number, because it can be changed into a prime (70351031) 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, 1851326 + ... + 1851363.

It is an arithmetic number, because the mean of its divisors is an integer number (18513450).

Almost surely, 2^70351091 is an apocalyptic number.

70351091 is a deficient number, since it is larger than the sum of its proper divisors (3702709).

70351091 is a wasteful number, since it uses less digits than its factorization.

70351091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3702708.

The product of its (nonzero) digits is 945, while the sum is 26.

The square root of 70351091 is about 8387.5557226167. Note that the first 3 decimals coincide. The cubic root of 70351091 is about 412.8164032195.

Adding to 70351091 its reverse (19015307), we get a palindrome (89366398).

The spelling of 70351091 in words is "seventy million, three hundred fifty-one thousand, ninety-one".