47072091 has 8 divisors (see below), whose sum is σ = 68468544. Its totient is φ = 28528520.

The previous prime is 47072087. The next prime is 47072093. The reversal of 47072091 is 19027074.

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 47072091 - 2² = 47072087 is a prime.

It is a super-2 number, since 2×47072091² = 4431563502224562, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (47072093) 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, 713181 + ... + 713246.

It is an arithmetic number, because the mean of its divisors is an integer number (8558568).

Almost surely, 2^47072091 is an apocalyptic number.

47072091 is a deficient number, since it is larger than the sum of its proper divisors (21396453).

47072091 is a wasteful number, since it uses less digits than its factorization.

47072091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1426441.

The product of its (nonzero) digits is 3528, while the sum is 30.

The square root of 47072091 is about 6860.9103623353. The cubic root of 47072091 is about 361.0670271462.

The spelling of 47072091 in words is "forty-seven million, seventy-two thousand, ninety-one".