75421679 has 2 divisors, whose sum is σ = 75421680. Its totient is φ = 75421678.

The previous prime is 75421657. The next prime is 75421693. The reversal of 75421679 is 97612457.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 75421679 - 2¹² = 75417583 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75421609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37710839 + 37710840.

It is an arithmetic number, because the mean of its divisors is an integer number (37710840).

Almost surely, 2^75421679 is an apocalyptic number.

75421679 is a deficient number, since it is larger than the sum of its proper divisors (1).

75421679 is an equidigital number, since it uses as much as digits as its factorization.

75421679 is an evil number, because the sum of its binary digits is even.

The product of its digits is 105840, while the sum is 41.

The square root of 75421679 is about 8684.5655619611. The cubic root of 75421679 is about 422.5052068030.

The spelling of 75421679 in words is "seventy-five million, four hundred twenty-one thousand, six hundred seventy-nine".