748681861 has 2 divisors, whose sum is σ = 748681862. Its totient is φ = 748681860.

The previous prime is 748681859. The next prime is 748681867. The reversal of 748681861 is 168186847.

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., 498852225 + 249829636 = 22335^2 + 15806^2 .

It is an emirp because it is prime and its reverse (168186847) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 748681861 - 2¹ = 748681859 is a prime.

Together with 748681859, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (748681867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 374340930 + 374340931.

It is an arithmetic number, because the mean of its divisors is an integer number (374340931).

Almost surely, 2^748681861 is an apocalyptic number.

It is an amenable number.

748681861 is a deficient number, since it is larger than the sum of its proper divisors (1).

748681861 is an equidigital number, since it uses as much as digits as its factorization.

748681861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 516096, while the sum is 49.

The square root of 748681861 is about 27362.0514764518. The cubic root of 748681861 is about 908.0277137259.

It can be divided in two parts, 74868 and 1861, that added together give a square (76729 = 277²).

The spelling of 748681861 in words is "seven hundred forty-eight million, six hundred eighty-one thousand, eight hundred sixty-one".