75670409 has 2 divisors, whose sum is σ = 75670410. Its totient is φ = 75670408.

The previous prime is 75670363. The next prime is 75670453. The reversal of 75670409 is 90407657.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40005625 + 35664784 = 6325^2 + 5972^2 .

It is an emirp because it is prime and its reverse (90407657) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 75670409 - 2¹² = 75666313 is a prime.

It is a plaindrome in base 15.

It is not a weakly prime, because it can be changed into another prime (75670499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37835204 + 37835205.

It is an arithmetic number, because the mean of its divisors is an integer number (37835205).

Almost surely, 2^75670409 is an apocalyptic number.

It is an amenable number.

75670409 is a deficient number, since it is larger than the sum of its proper divisors (1).

75670409 is an equidigital number, since it uses as much as digits as its factorization.

75670409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 52920, while the sum is 38.

The square root of 75670409 is about 8698.8740075943. The cubic root of 75670409 is about 422.9691512507.

The spelling of 75670409 in words is "seventy-five million, six hundred seventy thousand, four hundred nine".