37998973 has 2 divisors, whose sum is σ = 37998974. Its totient is φ = 37998972.

The previous prime is 37998953. The next prime is 37998979. The reversal of 37998973 is 37989973.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36264484 + 1734489 = 6022^2 + 1317^2 .

It is a cyclic number.

It is not a de Polignac number, because 37998973 - 2⁵ = 37998941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (37998979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18999486 + 18999487.

It is an arithmetic number, because the mean of its divisors is an integer number (18999487).

Almost surely, 2^37998973 is an apocalyptic number.

It is an amenable number.

37998973 is a deficient number, since it is larger than the sum of its proper divisors (1).

37998973 is an equidigital number, since it uses as much as digits as its factorization.

37998973 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2571912, while the sum is 55.

The square root of 37998973 is about 6164.3307017064. The cubic root of 37998973 is about 336.1945119256.

The spelling of 37998973 in words is "thirty-seven million, nine hundred ninety-eight thousand, nine hundred seventy-three".