47308997 has 4 divisors (see below), whose sum is σ = 47329740. Its totient is φ = 47288256.

The previous prime is 47308979. The next prime is 47309027. The reversal of 47308997 is 79980374.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 21104836 + 26204161 = 4594^2 + 5119^2 .

It is a cyclic number.

It is not a de Polignac number, because 47308997 - 2¹⁴ = 47292613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47308927) 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, 6458 + ... + 11675.

It is an arithmetic number, because the mean of its divisors is an integer number (11832435).

Almost surely, 2^47308997 is an apocalyptic number.

It is an amenable number.

47308997 is a deficient number, since it is larger than the sum of its proper divisors (20743).

47308997 is a wasteful number, since it uses less digits than its factorization.

47308997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20742.

The product of its (nonzero) digits is 381024, while the sum is 47.

The square root of 47308997 is about 6878.1536039841. The cubic root of 47308997 is about 361.6717438840.

The spelling of 47308997 in words is "forty-seven million, three hundred eight thousand, nine hundred ninety-seven".