742394991 has 12 divisors (see below), whose sum is σ = 1066247448. Its totient is φ = 456753744.

The previous prime is 742394977. The next prime is 742395007. The reversal of 742394991 is 199493247.

It is a happy number.

It is not a de Polignac number, because 742394991 - 2⁶ = 742394927 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 742394991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (742394921) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 167976 + ... + 172338.

It is an arithmetic number, because the mean of its divisors is an integer number (88853954).

Almost surely, 2^742394991 is an apocalyptic number.

742394991 is a deficient number, since it is larger than the sum of its proper divisors (323852457).

742394991 is an frugal number, since it uses more digits than its factorization.

742394991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8742 (or 4379 counting only the distinct ones).

The product of its digits is 489888, while the sum is 48.

The square root of 742394991 is about 27246.9262670122. The cubic root of 742394991 is about 905.4789203281.

The spelling of 742394991 in words is "seven hundred forty-two million, three hundred ninety-four thousand, nine hundred ninety-one".