88691401 has 2 divisors, whose sum is σ = 88691402. Its totient is φ = 88691400.

The previous prime is 88691399. The next prime is 88691417. The reversal of 88691401 is 10419688.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 82446400 + 6245001 = 9080^2 + 2499^2 .

It is a cyclic number.

It is not a de Polignac number, because 88691401 - 2¹ = 88691399 is a prime.

It is a super-2 number, since 2×88691401² = 15732329222685602, which contains 22 as substring.

Together with 88691399, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (88691441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44345700 + 44345701.

It is an arithmetic number, because the mean of its divisors is an integer number (44345701).

Almost surely, 2^88691401 is an apocalyptic number.

It is an amenable number.

88691401 is a deficient number, since it is larger than the sum of its proper divisors (1).

88691401 is an equidigital number, since it uses as much as digits as its factorization.

88691401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 37.

The square root of 88691401 is about 9417.6112151649. The cubic root of 88691401 is about 445.9578760648.

The spelling of 88691401 in words is "eighty-eight million, six hundred ninety-one thousand, four hundred one".