47749609 has 2 divisors, whose sum is σ = 47749610. Its totient is φ = 47749608.

The previous prime is 47749577. The next prime is 47749613. The reversal of 47749609 is 90694774.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39501225 + 8248384 = 6285^2 + 2872^2 .

It is a cyclic number.

It is not a de Polignac number, because 47749609 - 2⁵ = 47749577 is a prime.

It is not a weakly prime, because it can be changed into another prime (47749699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23874804 + 23874805.

It is an arithmetic number, because the mean of its divisors is an integer number (23874805).

Almost surely, 2^47749609 is an apocalyptic number.

It is an amenable number.

47749609 is a deficient number, since it is larger than the sum of its proper divisors (1).

47749609 is an equidigital number, since it uses as much as digits as its factorization.

47749609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 381024, while the sum is 46.

The square root of 47749609 is about 6910.1091887176. The cubic root of 47749609 is about 362.7910851041.

It can be divided in two parts, 477 and 49609, that added together give a triangular number (50086 = T₃₁₆).

The spelling of 47749609 in words is "forty-seven million, seven hundred forty-nine thousand, six hundred nine".