7850981 has 4 divisors (see below), whose sum is σ = 8192352. Its totient is φ = 7509612.

The previous prime is 7850963. The next prime is 7850987. The reversal of 7850981 is 1890587.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1890587 = 17 ⋅111211.

It is a cyclic number.

It is not a de Polignac number, because 7850981 - 2⁶ = 7850917 is a prime.

It is a super-2 number, since 2×7850981² = 123275805324722, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7850987) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 170651 + ... + 170696.

It is an arithmetic number, because the mean of its divisors is an integer number (2048088).

Almost surely, 2^7850981 is an apocalyptic number.

It is an amenable number.

7850981 is a deficient number, since it is larger than the sum of its proper divisors (341371).

7850981 is a wasteful number, since it uses less digits than its factorization.

7850981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341370.

The product of its (nonzero) digits is 20160, while the sum is 38.

The square root of 7850981 is about 2801.9602067124. The cubic root of 7850981 is about 198.7503835548.

It can be divided in two parts, 7850 and 981, that multiplied together give a triangular number (7700850 = T₃₉₂₄).

The spelling of 7850981 in words is "seven million, eight hundred fifty thousand, nine hundred eighty-one".