1977506073 has 12 divisors (see below), whose sum is σ = 3006734640. Its totient is φ = 1248951096.

The previous prime is 1977506071. The next prime is 1977506077. The reversal of 1977506073 is 3706057791.

1977506073 is a `hidden beast` number, since 1 + 9 + 77 + 506 + 0 + 73 = 666.

It is not a de Polignac number, because 1977506073 - 2¹ = 1977506071 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (1977506071) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5782011 + ... + 5782352.

It is an arithmetic number, because the mean of its divisors is an integer number (250561220).

Almost surely, 2^1977506073 is an apocalyptic number.

It is an amenable number.

1977506073 is a deficient number, since it is larger than the sum of its proper divisors (1029228567).

1977506073 is a wasteful number, since it uses less digits than its factorization.

1977506073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11564388 (or 11564385 counting only the distinct ones).

The product of its (nonzero) digits is 277830, while the sum is 45.

The square root of 1977506073 is about 44469.1586720505. The cubic root of 1977506073 is about 1255.1798016490.

The spelling of 1977506073 in words is "one billion, nine hundred seventy-seven million, five hundred six thousand, seventy-three".