37991461 has 16 divisors (see below), whose sum is σ = 40836096. Its totient is φ = 35280000.

The previous prime is 37991417. The next prime is 37991467. The reversal of 37991461 is 16419973.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-37991461 is a prime.

It is a super-2 number, since 2×37991461² = 2886702217829042, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (37991467) 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 15 ways as a sum of consecutive naturals, for example, 90031 + ... + 90451.

It is an arithmetic number, because the mean of its divisors is an integer number (2552256).

Almost surely, 2^37991461 is an apocalyptic number.

37991461 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

37991461 is the 2757-th centered decagonal number.

It is an amenable number.

37991461 is a deficient number, since it is larger than the sum of its proper divisors (2844635).

37991461 is a wasteful number, since it uses less digits than its factorization.

37991461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 564.

The product of its digits is 40824, while the sum is 40.

The square root of 37991461 is about 6163.7213596982. The cubic root of 37991461 is about 336.1723564180.

The spelling of 37991461 in words is "thirty-seven million, nine hundred ninety-one thousand, four hundred sixty-one".