76891149 has 6 divisors (see below), whose sum is σ = 111065006. Its totient is φ = 51260760.

The previous prime is 76891147. The next prime is 76891159. The reversal of 76891149 is 94119867.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 65901924 + 10989225 = 8118^2 + 3315^2 .

It is not a de Polignac number, because 76891149 - 2¹ = 76891147 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76891147) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4271722 + ... + 4271739.

Almost surely, 2^76891149 is an apocalyptic number.

It is an amenable number.

76891149 is a deficient number, since it is larger than the sum of its proper divisors (34173857).

76891149 is a wasteful number, since it uses less digits than its factorization.

76891149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8543467 (or 8543464 counting only the distinct ones).

The product of its digits is 108864, while the sum is 45.

The square root of 76891149 is about 8768.7598324963. The cubic root of 76891149 is about 425.2315213746.

The spelling of 76891149 in words is "seventy-six million, eight hundred ninety-one thousand, one hundred forty-nine".