738661 has 16 divisors (see below), whose sum is σ = 943488. Its totient is φ = 561600.

The previous prime is 738643. The next prime is 738677. The reversal of 738661 is 166837.

738661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a 3-Lehmer number, since φ(738661) divides (738661-1)³.

It is a cyclic number.

It is not a de Polignac number, because 738661 - 2¹³ = 730469 is a prime.

Its product of digits (6048) is a multiple of the sum of its prime divisors (252).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (738961) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3991 + ... + 4171.

It is an arithmetic number, because the mean of its divisors is an integer number (58968).

2⁷³⁸⁶⁶¹ is an apocalyptic number.

It is an amenable number.

738661 is a deficient number, since it is larger than the sum of its proper divisors (204827).

738661 is a wasteful number, since it uses less digits than its factorization.

738661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252.

The product of its digits is 6048, while the sum is 31.

The square root of 738661 is about 859.4538963784. The cubic root of 738661 is about 90.3958285725.

It can be divided in two parts, 7386 and 61, that added together give a palindrome (7447).

The spelling of 738661 in words is "seven hundred thirty-eight thousand, six hundred sixty-one".