47777749 has 2 divisors, whose sum is σ = 47777750. Its totient is φ = 47777748.

The previous prime is 47777731. The next prime is 47777783. The reversal of 47777749 is 94777774.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45995524 + 1782225 = 6782^2 + 1335^2 .

It is a cyclic number.

It is not a de Polignac number, because 47777749 - 2²⁵ = 14223317 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 47777696 and 47777705.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47771749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23888874 + 23888875.

It is an arithmetic number, because the mean of its divisors is an integer number (23888875).

Almost surely, 2^47777749 is an apocalyptic number.

It is an amenable number.

47777749 is a deficient number, since it is larger than the sum of its proper divisors (1).

47777749 is an equidigital number, since it uses as much as digits as its factorization.

47777749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2420208, while the sum is 52.

The square root of 47777749 is about 6912.1450360941. The cubic root of 47777749 is about 362.8623382972.

The spelling of 47777749 in words is "forty-seven million, seven hundred seventy-seven thousand, seven hundred forty-nine".