743631394 has 12 divisors (see below), whose sum is σ = 1226070342. Its totient is φ = 338014160.

The previous prime is 743631373. The next prime is 743631403. The reversal of 743631394 is 493136347.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 588305025 + 155326369 = 24255^2 + 12463^2 .

It is an unprimeable number.

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 in 5 ways as a sum of consecutive naturals, for example, 1536187 + ... + 1536670.

Almost surely, 2^743631394 is an apocalyptic number.

743631394 is a deficient number, since it is larger than the sum of its proper divisors (482438948).

743631394 is a wasteful number, since it uses less digits than its factorization.

743631394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3072881 (or 3072870 counting only the distinct ones).

The product of its digits is 163296, while the sum is 40.

The square root of 743631394 is about 27269.6056810508. The cubic root of 743631394 is about 905.9813105381.

It can be divided in two parts, 74363 and 1394, that added together give a palindrome (75757).

The spelling of 743631394 in words is "seven hundred forty-three million, six hundred thirty-one thousand, three hundred ninety-four".