37981087 has 2 divisors, whose sum is σ = 37981088. Its totient is φ = 37981086.

The previous prime is 37981081. The next prime is 37981103. The reversal of 37981087 is 78018973.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 37981087 - 2³ = 37981079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (37981081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18990543 + 18990544.

It is an arithmetic number, because the mean of its divisors is an integer number (18990544).

Almost surely, 2^37981087 is an apocalyptic number.

37981087 is a deficient number, since it is larger than the sum of its proper divisors (1).

37981087 is an equidigital number, since it uses as much as digits as its factorization.

37981087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 84672, while the sum is 43.

The square root of 37981087 is about 6162.8797651747. The cubic root of 37981087 is about 336.1417550722.

The spelling of 37981087 in words is "thirty-seven million, nine hundred eighty-one thousand, eighty-seven".