75228949 has 2 divisors, whose sum is σ = 75228950. Its totient is φ = 75228948.

The previous prime is 75228869. The next prime is 75228983. The reversal of 75228949 is 94982257.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39312900 + 35916049 = 6270^2 + 5993^2 .

It is a cyclic number.

It is not a de Polignac number, because 75228949 - 2⁷ = 75228821 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 75228899 and 75228908.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75228149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37614474 + 37614475.

It is an arithmetic number, because the mean of its divisors is an integer number (37614475).

Almost surely, 2^75228949 is an apocalyptic number.

It is an amenable number.

75228949 is a deficient number, since it is larger than the sum of its proper divisors (1).

75228949 is an equidigital number, since it uses as much as digits as its factorization.

75228949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 362880, while the sum is 46.

The square root of 75228949 is about 8673.4623421100. The cubic root of 75228949 is about 422.1450146633.

It can be divided in two parts, 7522 and 8949, that added together give a triangular number (16471 = T₁₈₁).

The spelling of 75228949 in words is "seventy-five million, two hundred twenty-eight thousand, nine hundred forty-nine".