2762765021 has 2 divisors, whose sum is σ = 2762765022. Its totient is φ = 2762765020.

The previous prime is 2762764997. The next prime is 2762765039. The reversal of 2762765021 is 1205672672.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2555808025 + 206956996 = 50555^2 + 14386^2 .

It is a cyclic number.

It is not a de Polignac number, because 2762765021 - 2⁶ = 2762764957 is a prime.

It is a super-2 number, since 2×2762765021² = 15265741122522260882, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2762765041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1381382510 + 1381382511.

It is an arithmetic number, because the mean of its divisors is an integer number (1381382511).

Almost surely, 2^2762765021 is an apocalyptic number.

It is an amenable number.

2762765021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2762765021 is an equidigital number, since it uses as much as digits as its factorization.

2762765021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 70560, while the sum is 38.

The square root of 2762765021 is about 52562.0111963003. The cubic root of 2762765021 is about 1403.1840829092.

The spelling of 2762765021 in words is "two billion, seven hundred sixty-two million, seven hundred sixty-five thousand, twenty-one".