102747431 has 2 divisors, whose sum is σ = 102747432. Its totient is φ = 102747430.

The previous prime is 102747413. The next prime is 102747451. The reversal of 102747431 is 134747201.

Together with previous prime (102747413) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is an emirp because it is prime and its reverse (134747201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 102747431 - 2⁶ = 102747367 is a prime.

It is a super-2 number, since 2×102747431² = 21114069154199522, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 102747394 and 102747403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102747451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51373715 + 51373716.

It is an arithmetic number, because the mean of its divisors is an integer number (51373716).

Almost surely, 2^102747431 is an apocalyptic number.

102747431 is a deficient number, since it is larger than the sum of its proper divisors (1).

102747431 is an equidigital number, since it uses as much as digits as its factorization.

102747431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4704, while the sum is 29.

The square root of 102747431 is about 10136.4407461396. The cubic root of 102747431 is about 468.3713525054.

The spelling of 102747431 in words is "one hundred two million, seven hundred forty-seven thousand, four hundred thirty-one".