77620201 has 2 divisors, whose sum is σ = 77620202. Its totient is φ = 77620200.

The previous prime is 77620177. The next prime is 77620229. The reversal of 77620201 is 10202677.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68475625 + 9144576 = 8275^2 + 3024^2 .

It is a cyclic number.

It is not a de Polignac number, because 77620201 - 2¹¹ = 77618153 is a prime.

It is not a weakly prime, because it can be changed into another prime (77620271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38810100 + 38810101.

It is an arithmetic number, because the mean of its divisors is an integer number (38810101).

Almost surely, 2^77620201 is an apocalyptic number.

It is an amenable number.

77620201 is a deficient number, since it is larger than the sum of its proper divisors (1).

77620201 is an equidigital number, since it uses as much as digits as its factorization.

77620201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1176, while the sum is 25.

The square root of 77620201 is about 8810.2327438042. The cubic root of 77620201 is about 426.5712559962.

Adding to 77620201 its reverse (10202677), we get a palindrome (87822878).

The spelling of 77620201 in words is "seventy-seven million, six hundred twenty thousand, two hundred one".