1976976157 has 4 divisors (see below), whose sum is σ = 2129051260. Its totient is φ = 1824901056.

The previous prime is 1976976143. The next prime is 1976976167. The reversal of 1976976157 is 7516796791.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7516796791 = 7 ⋅1073828113.

It can be written as a sum of positive squares in 2 ways, for example, as 214739716 + 1762236441 = 14654^2 + 41979^2 .

It is a cyclic number.

It is not a de Polignac number, because 1976976157 - 2¹⁵ = 1976943389 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 (1976976137) 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, 76037532 + ... + 76037557.

It is an arithmetic number, because the mean of its divisors is an integer number (532262815).

Almost surely, 2^1976976157 is an apocalyptic number.

It is an amenable number.

1976976157 is a deficient number, since it is larger than the sum of its proper divisors (152075103).

1976976157 is a wasteful number, since it uses less digits than its factorization.

1976976157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152075102.

The product of its digits is 5000940, while the sum is 58.

The square root of 1976976157 is about 44463.2000310369. The cubic root of 1976976157 is about 1255.0676740066.

The spelling of 1976976157 in words is "one billion, nine hundred seventy-six million, nine hundred seventy-six thousand, one hundred fifty-seven".