37977754973 has 2 divisors, whose sum is σ = 37977754974. Its totient is φ = 37977754972.

The previous prime is 37977754963. The next prime is 37977754981. The reversal of 37977754973 is 37945777973.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35584295044 + 2393459929 = 188638^2 + 48923^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-37977754973 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (37977754943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18988877486 + 18988877487.

It is an arithmetic number, because the mean of its divisors is an integer number (18988877487).

Almost surely, 2^37977754973 is an apocalyptic number.

It is an amenable number.

37977754973 is a deficient number, since it is larger than the sum of its proper divisors (1).

37977754973 is an equidigital number, since it uses as much as digits as its factorization.

37977754973 is an evil number, because the sum of its binary digits is even.

The product of its digits is 245046060, while the sum is 68.

The spelling of 37977754973 in words is "thirty-seven billion, nine hundred seventy-seven million, seven hundred fifty-four thousand, nine hundred seventy-three".