76191421 has 4 divisors (see below), whose sum is σ = 76278592. Its totient is φ = 76104252.

The previous prime is 76191419. The next prime is 76191443. The reversal of 76191421 is 12419167.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12419167 = 1039 ⋅11953.

It is a cyclic number.

It is not a de Polignac number, because 76191421 - 2¹ = 76191419 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76191481) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42261 + ... + 44026.

It is an arithmetic number, because the mean of its divisors is an integer number (19069648).

Almost surely, 2^76191421 is an apocalyptic number.

It is an amenable number.

76191421 is a deficient number, since it is larger than the sum of its proper divisors (87171).

76191421 is an equidigital number, since it uses as much as digits as its factorization.

76191421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87170.

The product of its digits is 3024, while the sum is 31.

The square root of 76191421 is about 8728.7697300364. The cubic root of 76191421 is about 423.9376855289.

The spelling of 76191421 in words is "seventy-six million, one hundred ninety-one thousand, four hundred twenty-one".