102690451 has 2 divisors, whose sum is σ = 102690452. Its totient is φ = 102690450.

The previous prime is 102690449. The next prime is 102690457. The reversal of 102690451 is 154096201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 102690451 - 2¹ = 102690449 is a prime.

Together with 102690449, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (102690457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51345225 + 51345226.

It is an arithmetic number, because the mean of its divisors is an integer number (51345226).

Almost surely, 2^102690451 is an apocalyptic number.

102690451 is a deficient number, since it is larger than the sum of its proper divisors (1).

102690451 is an equidigital number, since it uses as much as digits as its factorization.

102690451 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 102690451 is about 10133.6297050958. The cubic root of 102690451 is about 468.2847559054.

The spelling of 102690451 in words is "one hundred two million, six hundred ninety thousand, four hundred fifty-one".