94128731 has 2 divisors, whose sum is σ = 94128732. Its totient is φ = 94128730.

The previous prime is 94128721. The next prime is 94128739. The reversal of 94128731 is 13782149.

It is a strong prime.

It is an emirp because it is prime and its reverse (13782149) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 94128731 - 2¹⁸ = 93866587 is a prime.

It is a super-2 number, since 2×94128731² = 17720435999340722, 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 = 94128691 and 94128700.

It is not a weakly prime, because it can be changed into another prime (94128739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 47064365 + 47064366.

It is an arithmetic number, because the mean of its divisors is an integer number (47064366).

Almost surely, 2^94128731 is an apocalyptic number.

94128731 is a deficient number, since it is larger than the sum of its proper divisors (1).

94128731 is an equidigital number, since it uses as much as digits as its factorization.

94128731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12096, while the sum is 35.

The square root of 94128731 is about 9701.9962378884. The cubic root of 94128731 is about 454.8910595362.

The spelling of 94128731 in words is "ninety-four million, one hundred twenty-eight thousand, seven hundred thirty-one".