47970206621 has 4 divisors (see below), whose sum is σ = 47984086332. Its totient is φ = 47956326912.

The previous prime is 47970206597. The next prime is 47970206633. The reversal of 47970206621 is 12660207974.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12660207974 = 2 ⋅6330103987.

It can be written as a sum of positive squares in 2 ways, for example, as 12473762596 + 35496444025 = 111686^2 + 188405^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47970206621 is a prime.

It is a super-2 number, since 2×47970206621² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47970236621) 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, 6934670 + ... + 6941583.

It is an arithmetic number, because the mean of its divisors is an integer number (11996021583).

Almost surely, 2^47970206621 is an apocalyptic number.

It is an amenable number.

47970206621 is a deficient number, since it is larger than the sum of its proper divisors (13879711).

47970206621 is a wasteful number, since it uses less digits than its factorization.

47970206621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13879710.

The product of its (nonzero) digits is 254016, while the sum is 44.

The spelling of 47970206621 in words is "forty-seven billion, nine hundred seventy million, two hundred six thousand, six hundred twenty-one".