70077221 has 4 divisors (see below), whose sum is σ = 70224000. Its totient is φ = 69930444.

The previous prime is 70077209. The next prime is 70077341. The reversal of 70077221 is 12277007.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 70077221 - 2¹⁸ = 69815077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70076221) 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, 72671 + ... + 73628.

It is an arithmetic number, because the mean of its divisors is an integer number (17556000).

Almost surely, 2^70077221 is an apocalyptic number.

It is an amenable number.

70077221 is a deficient number, since it is larger than the sum of its proper divisors (146779).

70077221 is a wasteful number, since it uses less digits than its factorization.

70077221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146778.

The product of its (nonzero) digits is 1372, while the sum is 26.

The square root of 70077221 is about 8371.2138307416. The cubic root of 70077221 is about 412.2800217986.

The spelling of 70077221 in words is "seventy million, seventy-seven thousand, two hundred twenty-one".