70353021 has 32 divisors (see below), whose sum is σ = 106507008. Its totient is φ = 41057280.

The previous prime is 70353013. The next prime is 70353037. The reversal of 70353021 is 12035307.

It is a happy number.

It is not a de Polignac number, because 70353021 - 2³ = 70353013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70353001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 42591 + ... + 44211.

It is an arithmetic number, because the mean of its divisors is an integer number (3328344).

Almost surely, 2^70353021 is an apocalyptic number.

It is an amenable number.

70353021 is a deficient number, since it is larger than the sum of its proper divisors (36153987).

70353021 is a wasteful number, since it uses less digits than its factorization.

70353021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1701.

The product of its (nonzero) digits is 630, while the sum is 21.

The square root of 70353021 is about 8387.6707732242. The cubic root of 70353021 is about 412.8201782303.

Adding to 70353021 its reverse (12035307), we get a palindrome (82388328).

The spelling of 70353021 in words is "seventy million, three hundred fifty-three thousand, twenty-one".