742991747 has 8 divisors (see below), whose sum is σ = 776299776. Its totient is φ = 709767432.

The previous prime is 742991731. The next prime is 742991759. The reversal of 742991747 is 747199247.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 742991747 - 2⁴ = 742991731 is a prime.

It is a super-2 number, since 2×742991747² = 1104073472220224018, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 742991695 and 742991704.

It is not an unprimeable number, because it can be changed into a prime (742991707) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 2423 + ... + 38624.

It is an arithmetic number, because the mean of its divisors is an integer number (97037472).

Almost surely, 2^742991747 is an apocalyptic number.

742991747 is a deficient number, since it is larger than the sum of its proper divisors (33308029).

742991747 is a wasteful number, since it uses less digits than its factorization.

742991747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41857.

The product of its digits is 889056, while the sum is 50.

The square root of 742991747 is about 27257.8749538551. The cubic root of 742991747 is about 905.7214710220.

The spelling of 742991747 in words is "seven hundred forty-two million, nine hundred ninety-one thousand, seven hundred forty-seven".