77422501 has 8 divisors (see below), whose sum is σ = 83454840. Its totient is φ = 71401152.

The previous prime is 77422451. The next prime is 77422507. The reversal of 77422501 is 10522477.

It can be written as a sum of positive squares in 4 ways, for example, as 11390625 + 66031876 = 3375^2 + 8126^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 77422501 - 2¹⁷ = 77291429 is a prime.

It is a super-2 number, since 2×77422501² = 11988487322190002, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 77422501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77422507) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17415 + ... + 21403.

It is an arithmetic number, because the mean of its divisors is an integer number (10431855).

Almost surely, 2^77422501 is an apocalyptic number.

It is an amenable number.

77422501 is a deficient number, since it is larger than the sum of its proper divisors (6032339).

77422501 is a wasteful number, since it uses less digits than its factorization.

77422501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5495.

The product of its (nonzero) digits is 3920, while the sum is 28.

The square root of 77422501 is about 8799.0056824621. The cubic root of 77422501 is about 426.2087866174.

Adding to 77422501 its reverse (10522477), we get a palindrome (87944978).

The spelling of 77422501 in words is "seventy-seven million, four hundred twenty-two thousand, five hundred one".