1937790981 has 48 divisors (see below), whose sum is σ = 3372969600. Its totient is φ = 1047250944.

The previous prime is 1937790979. The next prime is 1937790983. The reversal of 1937790981 is 1890977391.

It is an interprime number because it is at equal distance from previous prime (1937790979) and next prime (1937790983).

It is not a de Polignac number, because 1937790981 - 2¹ = 1937790979 is a prime.

It is a super-2 number, since 2×1937790981² = 7510067772089884722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1937790983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1024885 + ... + 1026773.

It is an arithmetic number, because the mean of its divisors is an integer number (70270200).

Almost surely, 2^1937790981 is an apocalyptic number.

It is an amenable number.

1937790981 is a deficient number, since it is larger than the sum of its proper divisors (1435178619).

1937790981 is a wasteful number, since it uses less digits than its factorization.

1937790981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2778 (or 2775 counting only the distinct ones).

The product of its (nonzero) digits is 857304, while the sum is 54.

The square root of 1937790981 is about 44020.3473521053. The cubic root of 1937790981 is about 1246.7201441770.

The spelling of 1937790981 in words is "one billion, nine hundred thirty-seven million, seven hundred ninety thousand, nine hundred eighty-one".