47309949 has 6 divisors (see below), whose sum is σ = 68336606. Its totient is φ = 31539960.

The previous prime is 47309947. The next prime is 47309971. The reversal of 47309949 is 94990374.

It can be written as a sum of positive squares in only one way, i.e., 25826724 + 21483225 = 5082^2 + 4635^2 .

It is not a de Polignac number, because 47309949 - 2¹ = 47309947 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 (47309947) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2628322 + ... + 2628339.

Almost surely, 2^47309949 is an apocalyptic number.

It is an amenable number.

47309949 is a deficient number, since it is larger than the sum of its proper divisors (21026657).

47309949 is a wasteful number, since it uses less digits than its factorization.

47309949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5256667 (or 5256664 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 45.

The square root of 47309949 is about 6878.2228082551. Note that the first 3 decimals coincide. The cubic root of 47309949 is about 361.6741698439.

The spelling of 47309949 in words is "forty-seven million, three hundred nine thousand, nine hundred forty-nine".