70821049 has 16 divisors (see below), whose sum is σ = 77680512. Its totient is φ = 64176768.

The previous prime is 70821029. The next prime is 70821073. The reversal of 70821049 is 94012807.

It is a cyclic number.

It is not a de Polignac number, because 70821049 - 2⁷ = 70820921 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 70821049.

It is not an unprimeable number, because it can be changed into a prime (70821029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 303837 + ... + 304069.

It is an arithmetic number, because the mean of its divisors is an integer number (4855032).

Almost surely, 2^70821049 is an apocalyptic number.

It is an amenable number.

70821049 is a deficient number, since it is larger than the sum of its proper divisors (6859463).

70821049 is a wasteful number, since it uses less digits than its factorization.

70821049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 576.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 70821049 is about 8415.5242855095. The cubic root of 70821049 is about 413.7335932986.

The spelling of 70821049 in words is "seventy million, eight hundred twenty-one thousand, forty-nine".