47136309 has 16 divisors (see below), whose sum is σ = 69588480. Its totient is φ = 28139760.

The previous prime is 47136307. The next prime is 47136329. The reversal of 47136309 is 90363174.

It is not a de Polignac number, because 47136309 - 2¹ = 47136307 is a prime.

It is a super-2 number, since 2×47136309² = 4443663252286962, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a self number, because there is not a number n which added to its sum of digits gives 47136309.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47136301) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8449 + ... + 12870.

It is an arithmetic number, because the mean of its divisors is an integer number (4349280).

Almost surely, 2^47136309 is an apocalyptic number.

It is an amenable number.

47136309 is a deficient number, since it is larger than the sum of its proper divisors (22452171).

47136309 is a wasteful number, since it uses less digits than its factorization.

47136309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21400.

The product of its (nonzero) digits is 13608, while the sum is 33.

The square root of 47136309 is about 6865.5887584387. The cubic root of 47136309 is about 361.2311475098.

The spelling of 47136309 in words is "forty-seven million, one hundred thirty-six thousand, three hundred nine".