1682620739 has 4 divisors (see below), whose sum is σ = 1701526680. Its totient is φ = 1663714800.

The previous prime is 1682620721. The next prime is 1682620741. The reversal of 1682620739 is 9370262861.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9370262861 = 17 ⋅551191933.

It is a cyclic number.

It is not a de Polignac number, because 1682620739 - 2⁸ = 1682620483 is a prime.

It is a super-2 number, since 2×1682620739² = 5662425102625812242, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1682620739.

It is not an unprimeable number, because it can be changed into a prime (1682620799) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9452837 + ... + 9453014.

It is an arithmetic number, because the mean of its divisors is an integer number (425381670).

Almost surely, 2^1682620739 is an apocalyptic number.

1682620739 is a deficient number, since it is larger than the sum of its proper divisors (18905941).

1682620739 is an equidigital number, since it uses as much as digits as its factorization.

1682620739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18905940.

The product of its (nonzero) digits is 217728, while the sum is 44.

The square root of 1682620739 is about 41019.7603479104. The cubic root of 1682620739 is about 1189.4022228936.

The spelling of 1682620739 in words is "one billion, six hundred eighty-two million, six hundred twenty thousand, seven hundred thirty-nine".