75691487 has 2 divisors, whose sum is σ = 75691488. Its totient is φ = 75691486.

The previous prime is 75691439. The next prime is 75691493. The reversal of 75691487 is 78419657.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-75691487 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75691787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37845743 + 37845744.

It is an arithmetic number, because the mean of its divisors is an integer number (37845744).

Almost surely, 2^75691487 is an apocalyptic number.

75691487 is a deficient number, since it is larger than the sum of its proper divisors (1).

75691487 is an equidigital number, since it uses as much as digits as its factorization.

75691487 is an evil number, because the sum of its binary digits is even.

The product of its digits is 423360, while the sum is 47.

The square root of 75691487 is about 8700.0854593504. The cubic root of 75691487 is about 423.0084203046.

The spelling of 75691487 in words is "seventy-five million, six hundred ninety-one thousand, four hundred eighty-seven".