1651467749 has 2 divisors, whose sum is σ = 1651467750. Its totient is φ = 1651467748.

The previous prime is 1651467679. The next prime is 1651467751. The reversal of 1651467749 is 9477641561.

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., 1154980225 + 496487524 = 33985^2 + 22282^2 .

It is an emirp because it is prime and its reverse (9477641561) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1651467749 is a prime.

Together with 1651467751, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1651467697 and 1651467706.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1651467799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 825733874 + 825733875.

It is an arithmetic number, because the mean of its divisors is an integer number (825733875).

Almost surely, 2^1651467749 is an apocalyptic number.

It is an amenable number.

1651467749 is a deficient number, since it is larger than the sum of its proper divisors (1).

1651467749 is an equidigital number, since it uses as much as digits as its factorization.

1651467749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1270080, while the sum is 50.

The square root of 1651467749 is about 40638.2547484510. The cubic root of 1651467749 is about 1182.0160281858.

The spelling of 1651467749 in words is "one billion, six hundred fifty-one million, four hundred sixty-seven thousand, seven hundred forty-nine".