76641397 has 4 divisors (see below), whose sum is σ = 87590176. Its totient is φ = 65692620.

The previous prime is 76641379. The next prime is 76641427. The reversal of 76641397 is 79314667.

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.

It is not a de Polignac number, because 76641397 - 2¹⁵ = 76608629 is a prime.

It is a super-3 number, since 3×76641397³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76641317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5474379 + ... + 5474392.

It is an arithmetic number, because the mean of its divisors is an integer number (21897544).

Almost surely, 2^76641397 is an apocalyptic number.

It is an amenable number.

76641397 is a deficient number, since it is larger than the sum of its proper divisors (10948779).

76641397 is a wasteful number, since it uses less digits than its factorization.

76641397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10948778.

The product of its digits is 190512, while the sum is 43.

The square root of 76641397 is about 8754.5072391312. The cubic root of 76641397 is about 424.7706203976.

The spelling of 76641397 in words is "seventy-six million, six hundred forty-one thousand, three hundred ninety-seven".