87723731 has 2 divisors, whose sum is σ = 87723732. Its totient is φ = 87723730.

The previous prime is 87723697. The next prime is 87723739. The reversal of 87723731 is 13732778.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 87723731 - 2¹⁸ = 87461587 is a prime.

It is a super-2 number, since 2×87723731² = 15390905961120722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (87723739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43861865 + 43861866.

It is an arithmetic number, because the mean of its divisors is an integer number (43861866).

Almost surely, 2^87723731 is an apocalyptic number.

87723731 is a deficient number, since it is larger than the sum of its proper divisors (1).

87723731 is an equidigital number, since it uses as much as digits as its factorization.

87723731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 49392, while the sum is 38.

The square root of 87723731 is about 9366.0947571547. The cubic root of 87723731 is about 444.3300629243.

The spelling of 87723731 in words is "eighty-seven million, seven hundred twenty-three thousand, seven hundred thirty-one".