47551949 has 2 divisors, whose sum is σ = 47551950. Its totient is φ = 47551948.

The previous prime is 47551943. The next prime is 47551957. The reversal of 47551949 is 94915574.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44129449 + 3422500 = 6643^2 + 1850^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47551949 is a prime.

It is a super-2 number, since 2×47551949² = 4522375707397202, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47551943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23775974 + 23775975.

It is an arithmetic number, because the mean of its divisors is an integer number (23775975).

Almost surely, 2^47551949 is an apocalyptic number.

It is an amenable number.

47551949 is a deficient number, since it is larger than the sum of its proper divisors (1).

47551949 is an equidigital number, since it uses as much as digits as its factorization.

47551949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 226800, while the sum is 44.

The square root of 47551949 is about 6895.7921227369. The cubic root of 47551949 is about 362.2898002931.

The spelling of 47551949 in words is "forty-seven million, five hundred fifty-one thousand, nine hundred forty-nine".