761920081 has 4 divisors (see below), whose sum is σ = 820529332. Its totient is φ = 703310832.

The previous prime is 761920069. The next prime is 761920087. The reversal of 761920081 is 180029167.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 368294481 + 393625600 = 19191^2 + 19840^2 .

It is a cyclic number.

It is not a de Polignac number, because 761920081 - 2²³ = 753531473 is a prime.

It is a super-2 number, since 2×761920081² = 1161044419662093122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (761920087) 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 in 3 ways as a sum of consecutive naturals, for example, 29304606 + ... + 29304631.

It is an arithmetic number, because the mean of its divisors is an integer number (205132333).

Almost surely, 2^761920081 is an apocalyptic number.

It is an amenable number.

761920081 is a deficient number, since it is larger than the sum of its proper divisors (58609251).

761920081 is a wasteful number, since it uses less digits than its factorization.

761920081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58609250.

The product of its (nonzero) digits is 6048, while the sum is 34.

The square root of 761920081 is about 27602.8998657750. The cubic root of 761920081 is about 913.3484020667.

The spelling of 761920081 in words is "seven hundred sixty-one million, nine hundred twenty thousand, eighty-one".