70823921 has 8 divisors (see below), whose sum is σ = 85703040. Its totient is φ = 57135168.

The previous prime is 70823903. The next prime is 70823941. The reversal of 70823921 is 12932807.

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 70823921 - 2¹⁰ = 70822897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70823941) 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, 297461 + ... + 297698.

It is an arithmetic number, because the mean of its divisors is an integer number (10712880).

Almost surely, 2^70823921 is an apocalyptic number.

It is an amenable number.

70823921 is a deficient number, since it is larger than the sum of its proper divisors (14879119).

70823921 is a wasteful number, since it uses less digits than its factorization.

70823921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 595183.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 70823921 is about 8415.6949208013. The cubic root of 70823921 is about 413.7391859241.

The spelling of 70823921 in words is "seventy million, eight hundred twenty-three thousand, nine hundred twenty-one".