761989105 has 16 divisors (see below), whose sum is σ = 922634064. Its totient is φ = 604119040.

The previous prime is 761989097. The next prime is 761989127. The reversal of 761989105 is 501989167.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 242331489 + 519657616 = 15567^2 + 22796^2 .

It is not a de Polignac number, because 761989105 - 2³ = 761989097 is a prime.

It is a super-2 number, since 2×761989105² = 1161254792277402050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 275409 + ... + 278161.

It is an arithmetic number, because the mean of its divisors is an integer number (57664629).

Almost surely, 2^761989105 is an apocalyptic number.

It is an amenable number.

761989105 is a deficient number, since it is larger than the sum of its proper divisors (160644959).

761989105 is a wasteful number, since it uses less digits than its factorization.

761989105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3236.

The product of its (nonzero) digits is 136080, while the sum is 46.

The square root of 761989105 is about 27604.1501408756. The cubic root of 761989105 is about 913.3759819743.

The spelling of 761989105 in words is "seven hundred sixty-one million, nine hundred eighty-nine thousand, one hundred five".