83691401 has 2 divisors, whose sum is σ = 83691402. Its totient is φ = 83691400.

The previous prime is 83691397. The next prime is 83691403. The reversal of 83691401 is 10419638.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72267001 + 11424400 = 8501^2 + 3380^2 .

It is a cyclic number.

It is not a de Polignac number, because 83691401 - 2² = 83691397 is a prime.

Together with 83691403, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (83691403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41845700 + 41845701.

It is an arithmetic number, because the mean of its divisors is an integer number (41845701).

Almost surely, 2^83691401 is an apocalyptic number.

It is an amenable number.

83691401 is a deficient number, since it is larger than the sum of its proper divisors (1).

83691401 is an equidigital number, since it uses as much as digits as its factorization.

83691401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 83691401 is about 9148.3004432517. The cubic root of 83691401 is about 437.4149403071.

The spelling of 83691401 in words is "eighty-three million, six hundred ninety-one thousand, four hundred one".