47280397 has 4 divisors (see below), whose sum is σ = 47432736. Its totient is φ = 47128060.

The previous prime is 47280377. The next prime is 47280403. The reversal of 47280397 is 79308274.

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 a cyclic number.

It is not a de Polignac number, because 47280397 - 2¹⁹ = 46756109 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 (47280367) 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, 75703 + ... + 76324.

It is an arithmetic number, because the mean of its divisors is an integer number (11858184).

Almost surely, 2^47280397 is an apocalyptic number.

It is an amenable number.

47280397 is a deficient number, since it is larger than the sum of its proper divisors (152339).

47280397 is a wasteful number, since it uses less digits than its factorization.

47280397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152338.

The product of its (nonzero) digits is 84672, while the sum is 40.

The square root of 47280397 is about 6876.0742433455. The cubic root of 47280397 is about 361.5988479753.

The spelling of 47280397 in words is "forty-seven million, two hundred eighty thousand, three hundred ninety-seven".