746686639 has 2 divisors, whose sum is σ = 746686640. Its totient is φ = 746686638.

The previous prime is 746686627. The next prime is 746686649. The reversal of 746686639 is 936686647.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 746686639 - 2¹⁵ = 746653871 is a prime.

It is a super-2 number, since 2×746686639² = 1115081873722232642, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 746686639.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (746686649) 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, 373343319 + 373343320.

It is an arithmetic number, because the mean of its divisors is an integer number (373343320).

Almost surely, 2^746686639 is an apocalyptic number.

746686639 is a deficient number, since it is larger than the sum of its proper divisors (1).

746686639 is an equidigital number, since it uses as much as digits as its factorization.

746686639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7838208, while the sum is 55.

The square root of 746686639 is about 27325.5674963943. The cubic root of 746686639 is about 907.2203709595.

The spelling of 746686639 in words is "seven hundred forty-six million, six hundred eighty-six thousand, six hundred thirty-nine".