761949861 has 4 divisors (see below), whose sum is σ = 1015933152. Its totient is φ = 507966572.

The previous prime is 761949829. The next prime is 761949871. The reversal of 761949861 is 168949167.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 761949861 - 2⁵ = 761949829 is a prime.

It is a super-5 number, since 5×761949861⁵ (a number of 46 digits) contains 55555 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (761949871) 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, 126991641 + ... + 126991646.

It is an arithmetic number, because the mean of its divisors is an integer number (253983288).

Almost surely, 2^761949861 is an apocalyptic number.

It is an amenable number.

761949861 is a deficient number, since it is larger than the sum of its proper divisors (253983291).

761949861 is a wasteful number, since it uses less digits than its factorization.

761949861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253983290.

The product of its digits is 653184, while the sum is 51.

The square root of 761949861 is about 27603.4392965804. The cubic root of 761949861 is about 913.3603014604.

The spelling of 761949861 in words is "seven hundred sixty-one million, nine hundred forty-nine thousand, eight hundred sixty-one".