7986731 has 2 divisors, whose sum is σ = 7986732. Its totient is φ = 7986730.

The previous prime is 7986721. The next prime is 7986739. The reversal of 7986731 is 1376897.

Added to its reverse (1376897) it gives a triangular number (9363628 = T₄₃₂₇).

It is a strong prime.

It is an emirp because it is prime and its reverse (1376897) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7986731 - 2²² = 3792427 is a prime.

It is a super-2 number, since 2×7986731² = 127575744132722, which contains 22 as substring.

It is a Chen prime.

It is a d-powerful number, because it can be written as 7⁴ + 9³ + 8⁷ + 6⁷ + 7⁷ + 3¹⁴ + 1 .

It is not a weakly prime, because it can be changed into another prime (7986739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3993365 + 3993366.

It is an arithmetic number, because the mean of its divisors is an integer number (3993366).

Almost surely, 2^7986731 is an apocalyptic number.

7986731 is a deficient number, since it is larger than the sum of its proper divisors (1).

7986731 is an equidigital number, since it uses as much as digits as its factorization.

7986731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 63504, while the sum is 41.

The square root of 7986731 is about 2826.0805013304. The cubic root of 7986731 is about 199.8893638095.

Adding to 7986731 its reverse (1376897), we get a triangular number (9363628 = T₄₃₂₇).

The spelling of 7986731 in words is "seven million, nine hundred eighty-six thousand, seven hundred thirty-one".