75649477 has 2 divisors, whose sum is σ = 75649478. Its totient is φ = 75649476.

The previous prime is 75649459. The next prime is 75649489. The reversal of 75649477 is 77494657.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63266116 + 12383361 = 7954^2 + 3519^2 .

It is a cyclic number.

It is not a de Polignac number, because 75649477 - 2¹⁹ = 75125189 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 75649477.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75649417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37824738 + 37824739.

It is an arithmetic number, because the mean of its divisors is an integer number (37824739).

Almost surely, 2^75649477 is an apocalyptic number.

It is an amenable number.

75649477 is a deficient number, since it is larger than the sum of its proper divisors (1).

75649477 is an equidigital number, since it uses as much as digits as its factorization.

75649477 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1481760, while the sum is 49.

The square root of 75649477 is about 8697.6707801572. The cubic root of 75649477 is about 422.9301469826.

The spelling of 75649477 in words is "seventy-five million, six hundred forty-nine thousand, four hundred seventy-seven".