37948987 has 2 divisors, whose sum is σ = 37948988. Its totient is φ = 37948986.

The previous prime is 37948973. The next prime is 37949027. The reversal of 37948987 is 78984973.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-37948987 is a prime.

It is a super-2 number, since 2×37948987² = 2880251228652338, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (37948927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18974493 + 18974494.

It is an arithmetic number, because the mean of its divisors is an integer number (18974494).

Almost surely, 2^37948987 is an apocalyptic number.

37948987 is a deficient number, since it is larger than the sum of its proper divisors (1).

37948987 is an equidigital number, since it uses as much as digits as its factorization.

37948987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3048192, while the sum is 55.

The square root of 37948987 is about 6160.2749126967. The cubic root of 37948987 is about 336.0470308080.

The spelling of 37948987 in words is "thirty-seven million, nine hundred forty-eight thousand, nine hundred eighty-seven".