89739731 has 2 divisors, whose sum is σ = 89739732. Its totient is φ = 89739730.

The previous prime is 89739709. The next prime is 89739737. The reversal of 89739731 is 13793798.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-89739731 is a prime.

It is a super-2 number, since 2×89739731² = 16106438639904722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (89739737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44869865 + 44869866.

It is an arithmetic number, because the mean of its divisors is an integer number (44869866).

Almost surely, 2^89739731 is an apocalyptic number.

89739731 is a deficient number, since it is larger than the sum of its proper divisors (1).

89739731 is an equidigital number, since it uses as much as digits as its factorization.

89739731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 285768, while the sum is 47.

The square root of 89739731 is about 9473.1056681534. The cubic root of 89739731 is about 447.7080684055.

The spelling of 89739731 in words is "eighty-nine million, seven hundred thirty-nine thousand, seven hundred thirty-one".