76972396429 has 4 divisors (see below), whose sum is σ = 76982900476. Its totient is φ = 76961892384.

The previous prime is 76972396411. The next prime is 76972396441. The reversal of 76972396429 is 92469327967.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 92469327967 = 179083 ⋅516349.

It can be written as a sum of positive squares in 2 ways, for example, as 35080540804 + 41891855625 = 187298^2 + 204675^2 .

It is a cyclic number.

It is not a de Polignac number, because 76972396429 - 2¹¹ = 76972394381 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 (76972396409) 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, 5241024 + ... + 5255689.

It is an arithmetic number, because the mean of its divisors is an integer number (19245725119).

Almost surely, 2^76972396429 is an apocalyptic number.

It is an amenable number.

76972396429 is a deficient number, since it is larger than the sum of its proper divisors (10504047).

76972396429 is a wasteful number, since it uses less digits than its factorization.

76972396429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10504046.

The product of its digits is 61725888, while the sum is 64.

The spelling of 76972396429 in words is "seventy-six billion, nine hundred seventy-two million, three hundred ninety-six thousand, four hundred twenty-nine".