77137946 has 4 divisors (see below), whose sum is σ = 115706922. Its totient is φ = 38568972.

The previous prime is 77137943. The next prime is 77137961. The reversal of 77137946 is 64973177.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 64973177 = 53 ⋅1225909.

It can be written as a sum of positive squares in only one way, i.e., 58690921 + 18447025 = 7661^2 + 4295^2 .

It is a junction number, because it is equal to n+sod(n) for n = 77137897 and 77137906.

It is not an unprimeable number, because it can be changed into a prime (77137943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19284485 + ... + 19284488.

Almost surely, 2^77137946 is an apocalyptic number.

77137946 is a deficient number, since it is larger than the sum of its proper divisors (38568976).

77137946 is a wasteful number, since it uses less digits than its factorization.

77137946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38568975.

The product of its digits is 222264, while the sum is 44.

The square root of 77137946 is about 8782.8210729810. The cubic root of 77137946 is about 425.6859897306.

The spelling of 77137946 in words is "seventy-seven million, one hundred thirty-seven thousand, nine hundred forty-six".