47661969 has 4 divisors (see below), whose sum is σ = 63549296. Its totient is φ = 31774644.

The previous prime is 47661961. The next prime is 47661979. The reversal of 47661969 is 96916674.

47661969 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 not a de Polignac number, because 47661969 - 2³ = 47661961 is a prime.

It is a super-2 number, since 2×47661969² = 4543326577913922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (47661961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7943659 + ... + 7943664.

It is an arithmetic number, because the mean of its divisors is an integer number (15887324).

Almost surely, 2^47661969 is an apocalyptic number.

It is an amenable number.

47661969 is a deficient number, since it is larger than the sum of its proper divisors (15887327).

47661969 is a wasteful number, since it uses less digits than its factorization.

47661969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15887326.

The product of its digits is 489888, while the sum is 48.

The square root of 47661969 is about 6903.7648424610. The cubic root of 47661969 is about 362.5689926549.

The spelling of 47661969 in words is "forty-seven million, six hundred sixty-one thousand, nine hundred sixty-nine".