47138897 has 8 divisors (see below), whose sum is σ = 50830080. Its totient is φ = 43457040.

The previous prime is 47138893. The next prime is 47138951. The reversal of 47138897 is 79883174.

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 47138897 - 2² = 47138893 is a prime.

It is a super-2 number, since 2×47138897² = 4444151220753218, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47138893) 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, 11054 + ... + 14712.

It is an arithmetic number, because the mean of its divisors is an integer number (6353760).

Almost surely, 2^47138897 is an apocalyptic number.

It is an amenable number.

47138897 is a deficient number, since it is larger than the sum of its proper divisors (3691183).

47138897 is a wasteful number, since it uses less digits than its factorization.

47138897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4663.

The product of its digits is 338688, while the sum is 47.

The square root of 47138897 is about 6865.7772320401. Note that the first 3 decimals coincide. The cubic root of 47138897 is about 361.2377584722.

The spelling of 47138897 in words is "forty-seven million, one hundred thirty-eight thousand, eight hundred ninety-seven".