87694769 has 2 divisors, whose sum is σ = 87694770. Its totient is φ = 87694768.

The previous prime is 87694757. The next prime is 87694771. The reversal of 87694769 is 96749678.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55056400 + 32638369 = 7420^2 + 5713^2 .

It is a cyclic number.

It is not a de Polignac number, because 87694769 - 2⁸ = 87694513 is a prime.

It is a super-2 number, since 2×87694769² = 15380745019926722, which contains 22 as substring.

Together with 87694771, it forms a pair of twin primes.

It is a Chen prime.

It is an alternating number because its digits alternate between even and odd.

It is not a weakly prime, because it can be changed into another prime (87694799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43847384 + 43847385.

It is an arithmetic number, because the mean of its divisors is an integer number (43847385).

Almost surely, 2^87694769 is an apocalyptic number.

It is an amenable number.

87694769 is a deficient number, since it is larger than the sum of its proper divisors (1).

87694769 is an equidigital number, since it uses as much as digits as its factorization.

87694769 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4572288, while the sum is 56.

The square root of 87694769 is about 9364.5485208845. The cubic root of 87694769 is about 444.2811590013.

The spelling of 87694769 in words is "eighty-seven million, six hundred ninety-four thousand, seven hundred sixty-nine".