100691951 has 2 divisors, whose sum is σ = 100691952. Its totient is φ = 100691950.

The previous prime is 100691933. The next prime is 100691957. The reversal of 100691951 is 159196001.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 100691951 - 2¹⁰ = 100690927 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100691957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50345975 + 50345976.

It is an arithmetic number, because the mean of its divisors is an integer number (50345976).

Almost surely, 2^100691951 is an apocalyptic number.

100691951 is a deficient number, since it is larger than the sum of its proper divisors (1).

100691951 is an equidigital number, since it uses as much as digits as its factorization.

100691951 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2430, while the sum is 32.

The square root of 100691951 is about 10034.5379066502. The cubic root of 100691951 is about 465.2270075162.

The spelling of 100691951 in words is "one hundred million, six hundred ninety-one thousand, nine hundred fifty-one".