76623121 has 2 divisors, whose sum is σ = 76623122. Its totient is φ = 76623120.

The previous prime is 76623091. The next prime is 76623139. The reversal of 76623121 is 12132667.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55130625 + 21492496 = 7425^2 + 4636^2 .

It is an emirp because it is prime and its reverse (12132667) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 76623121 - 2⁵ = 76623089 is a prime.

It is a super-2 number, since 2×76623121² = 11742205343561282, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 76623121.

It is not a weakly prime, because it can be changed into another prime (76623821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38311560 + 38311561.

It is an arithmetic number, because the mean of its divisors is an integer number (38311561).

Almost surely, 2^76623121 is an apocalyptic number.

It is an amenable number.

76623121 is a deficient number, since it is larger than the sum of its proper divisors (1).

76623121 is an equidigital number, since it uses as much as digits as its factorization.

76623121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3024, while the sum is 28.

The square root of 76623121 is about 8753.4633717175. The cubic root of 76623121 is about 424.7368539419.

Adding to 76623121 its reverse (12132667), we get a palindrome (88755788).

The spelling of 76623121 in words is "seventy-six million, six hundred twenty-three thousand, one hundred twenty-one".