742488891 has 4 divisors (see below), whose sum is σ = 989985192. Its totient is φ = 494992592.

The previous prime is 742488883. The next prime is 742488907. The reversal of 742488891 is 198884247.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 198884247 = 3 ⋅66294749.

It is a cyclic number.

It is not a de Polignac number, because 742488891 - 2³ = 742488883 is a prime.

It is not an unprimeable number, because it can be changed into a prime (742488811) 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, 123748146 + ... + 123748151.

It is an arithmetic number, because the mean of its divisors is an integer number (247496298).

Almost surely, 2^742488891 is an apocalyptic number.

742488891 is a deficient number, since it is larger than the sum of its proper divisors (247496301).

742488891 is a wasteful number, since it uses less digits than its factorization.

742488891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247496300.

The product of its digits is 1032192, while the sum is 51.

The square root of 742488891 is about 27248.6493426738. The cubic root of 742488891 is about 905.5170944749.

The spelling of 742488891 in words is "seven hundred forty-two million, four hundred eighty-eight thousand, eight hundred ninety-one".