75028861 has 2 divisors, whose sum is σ = 75028862. Its totient is φ = 75028860.

The previous prime is 75028847. The next prime is 75028879. The reversal of 75028861 is 16882057.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70644025 + 4384836 = 8405^2 + 2094^2 .

It is a cyclic number.

It is not a de Polignac number, because 75028861 - 2²³ = 66640253 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 75028861.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75028661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37514430 + 37514431.

It is an arithmetic number, because the mean of its divisors is an integer number (37514431).

Almost surely, 2^75028861 is an apocalyptic number.

It is an amenable number.

75028861 is a deficient number, since it is larger than the sum of its proper divisors (1).

75028861 is an equidigital number, since it uses as much as digits as its factorization.

75028861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26880, while the sum is 37.

The square root of 75028861 is about 8661.9201681844. The cubic root of 75028861 is about 421.7704197362.

The spelling of 75028861 in words is "seventy-five million, twenty-eight thousand, eight hundred sixty-one".