75128629 has 2 divisors, whose sum is σ = 75128630. Its totient is φ = 75128628.

The previous prime is 75128621. The next prime is 75128663. The reversal of 75128629 is 92682157.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 73994404 + 1134225 = 8602^2 + 1065^2 .

It is a cyclic number.

It is not a de Polignac number, because 75128629 - 2³ = 75128621 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 75128591 and 75128600.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75128621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37564314 + 37564315.

It is an arithmetic number, because the mean of its divisors is an integer number (37564315).

Almost surely, 2^75128629 is an apocalyptic number.

It is an amenable number.

75128629 is a deficient number, since it is larger than the sum of its proper divisors (1).

75128629 is an equidigital number, since it uses as much as digits as its factorization.

75128629 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60480, while the sum is 40.

The square root of 75128629 is about 8667.6772551820. The cubic root of 75128629 is about 421.9572836228.

It can be divided in two parts, 75128 and 629, that added together give a palindrome (75757).

The spelling of 75128629 in words is "seventy-five million, one hundred twenty-eight thousand, six hundred twenty-nine".