651169 has 2 divisors, whose sum is σ = 651170. Its totient is φ = 651168.

The previous prime is 651143. The next prime is 651179. The reversal of 651169 is 961156.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 439569 + 211600 = 663^2 + 460^2 .

It is a cyclic number.

It is not a de Polignac number, because 651169 - 2¹³ = 642977 is a prime.

It is a super-2 number, since 2×651169² = 848042133122, which contains 22 as substring.

It is a Chen prime.

651169 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (651109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 325584 + 325585.

It is an arithmetic number, because the mean of its divisors is an integer number (325585).

2⁶⁵¹¹⁶⁹ is an apocalyptic number.

It is an amenable number.

651169 is a deficient number, since it is larger than the sum of its proper divisors (1).

651169 is an equidigital number, since it uses as much as digits as its factorization.

651169 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1620, while the sum is 28.

The square root of 651169 is about 806.9504321828. The cubic root of 651169 is about 86.6758093576.

It can be divided in two parts, 651 and 169, that added together give a triangular number (820 = T₄₀).

The spelling of 651169 in words is "six hundred fifty-one thousand, one hundred sixty-nine".