87351731 has 2 divisors, whose sum is σ = 87351732. Its totient is φ = 87351730.

The previous prime is 87351703. The next prime is 87351787. The reversal of 87351731 is 13715378.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87351731 - 2¹⁰ = 87350707 is a prime.

It is a super-2 number, since 2×87351731² = 15260649817392722, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 87351691 and 87351700.

It is not a weakly prime, because it can be changed into another prime (87351331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43675865 + 43675866.

It is an arithmetic number, because the mean of its divisors is an integer number (43675866).

Almost surely, 2^87351731 is an apocalyptic number.

87351731 is a deficient number, since it is larger than the sum of its proper divisors (1).

87351731 is an equidigital number, since it uses as much as digits as its factorization.

87351731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17640, while the sum is 35.

The square root of 87351731 is about 9346.2147953062. The cubic root of 87351731 is about 443.7010997891.

The spelling of 87351731 in words is "eighty-seven million, three hundred fifty-one thousand, seven hundred thirty-one".