70387221 has 8 divisors (see below), whose sum is σ = 93895200. Its totient is φ = 46902032.

The previous prime is 70387211. The next prime is 70387231. The reversal of 70387221 is 12278307.

It is an interprime number because it is at equal distance from previous prime (70387211) and next prime (70387231).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 70387221 - 2⁵ = 70387189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70387211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3751 + ... + 12443.

It is an arithmetic number, because the mean of its divisors is an integer number (11736900).

Almost surely, 2^70387221 is an apocalyptic number.

It is an amenable number.

70387221 is a deficient number, since it is larger than the sum of its proper divisors (23507979).

70387221 is a wasteful number, since it uses less digits than its factorization.

70387221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11395.

The product of its (nonzero) digits is 4704, while the sum is 30.

The square root of 70387221 is about 8389.7092321486. The cubic root of 70387221 is about 412.8870607548.

The spelling of 70387221 in words is "seventy million, three hundred eighty-seven thousand, two hundred twenty-one".