651487 has 2 divisors, whose sum is σ = 651488. Its totient is φ = 651486.

The previous prime is 651481. The next prime is 651503. The reversal of 651487 is 784156.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 651487 - 2¹⁵ = 618719 is a prime.

It is a super-2 number, since 2×651487² = 848870622338, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (651481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 325743 + 325744.

It is an arithmetic number, because the mean of its divisors is an integer number (325744).

2⁶⁵¹⁴⁸⁷ is an apocalyptic number.

651487 is a deficient number, since it is larger than the sum of its proper divisors (1).

651487 is an equidigital number, since it uses as much as digits as its factorization.

651487 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6720, while the sum is 31.

The square root of 651487 is about 807.1474462575. The cubic root of 651487 is about 86.6899165105.

The spelling of 651487 in words is "six hundred fifty-one thousand, four hundred eighty-seven".