1651714991 has 2 divisors, whose sum is σ = 1651714992. Its totient is φ = 1651714990.

The previous prime is 1651714931. The next prime is 1651715017. The reversal of 1651714991 is 1994171561.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1651714991 is a prime.

It is a super-2 number, since 2×1651714991² = 5456324822988260162, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1651714931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 825857495 + 825857496.

It is an arithmetic number, because the mean of its divisors is an integer number (825857496).

Almost surely, 2^1651714991 is an apocalyptic number.

1651714991 is a deficient number, since it is larger than the sum of its proper divisors (1).

1651714991 is an equidigital number, since it uses as much as digits as its factorization.

1651714991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 68040, while the sum is 44.

The square root of 1651714991 is about 40641.2966205558. The cubic root of 1651714991 is about 1182.0750119643.

The spelling of 1651714991 in words is "one billion, six hundred fifty-one million, seven hundred fourteen thousand, nine hundred ninety-one".