372991 has 4 divisors (see below), whose sum is σ = 389232. Its totient is φ = 356752.

The previous prime is 372979. The next prime is 373003. The reversal of 372991 is 199273.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 199273 = 101 ⋅1973.

It is an interprime number because it is at equal distance from previous prime (372979) and next prime (373003).

It is a cyclic number.

It is not a de Polignac number, because 372991 - 2¹⁷ = 241919 is a prime.

It is a Duffinian number.

372991 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (372901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8086 + ... + 8131.

It is an arithmetic number, because the mean of its divisors is an integer number (97308).

2³⁷²⁹⁹¹ is an apocalyptic number.

372991 is a deficient number, since it is larger than the sum of its proper divisors (16241).

372991 is a wasteful number, since it uses less digits than its factorization.

372991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16240.

The product of its digits is 3402, while the sum is 31.

The square root of 372991 is about 610.7298911958. The cubic root of 372991 is about 71.9834710000.

The spelling of 372991 in words is "three hundred seventy-two thousand, nine hundred ninety-one".