76009421 has 2 divisors, whose sum is σ = 76009422. Its totient is φ = 76009420.

The previous prime is 76009403. The next prime is 76009429. The reversal of 76009421 is 12490067.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75933796 + 75625 = 8714^2 + 275^2 .

It is a cyclic number.

It is not a de Polignac number, because 76009421 - 2¹⁴ = 75993037 is a prime.

It is a super-3 number, since 3×76009421³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (76009429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38004710 + 38004711.

It is an arithmetic number, because the mean of its divisors is an integer number (38004711).

Almost surely, 2^76009421 is an apocalyptic number.

It is an amenable number.

76009421 is a deficient number, since it is larger than the sum of its proper divisors (1).

76009421 is an equidigital number, since it uses as much as digits as its factorization.

76009421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 76009421 is about 8718.3382017446. The cubic root of 76009421 is about 423.5998601997.

Adding to 76009421 its reverse (12490067), we get a palindrome (88499488).

The spelling of 76009421 in words is "seventy-six million, nine thousand, four hundred twenty-one".