1937881 has 16 divisors (see below), whose sum is σ = 2299968. Its totient is φ = 1612800.

The previous prime is 1937879. The next prime is 1937891. The reversal of 1937881 is 1887391.

It is a 4-Lehmer number, since φ(1937881) divides (1937881-1)⁴.

It is a cyclic number.

It is not a de Polignac number, because 1937881 - 2¹ = 1937879 is a prime.

It is a super-2 number, since 2×1937881² = 7510765540322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1937881.

It is not an unprimeable number, because it can be changed into a prime (1937891) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7921 + ... + 8161.

It is an arithmetic number, because the mean of its divisors is an integer number (143748).

It is a Poulet number, since it divides 2^1937880-1.

2^1937881 is an apocalyptic number.

1937881 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1937881 is a deficient number, since it is larger than the sum of its proper divisors (362087).

1937881 is a wasteful number, since it uses less digits than its factorization.

1937881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312.

The product of its digits is 12096, while the sum is 37.

The square root of 1937881 is about 1392.0779432201. The cubic root of 1937881 is about 124.6739449108.

The spelling of 1937881 in words is "one million, nine hundred thirty-seven thousand, eight hundred eighty-one".