7491513938 has 4 divisors (see below), whose sum is σ = 11237270910. Its totient is φ = 3745756968.

The previous prime is 7491513937. The next prime is 7491513941. The reversal of 7491513938 is 8393151947.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 3814668169 + 3676845769 = 61763^2 + 60637^2 .

It is a super-3 number, since 3×7491513938³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (7491513937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1872878483 + ... + 1872878486.

Almost surely, 2^7491513938 is an apocalyptic number.

7491513938 is a deficient number, since it is larger than the sum of its proper divisors (3745756972).

7491513938 is a wasteful number, since it uses less digits than its factorization.

7491513938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3745756971.

The product of its digits is 816480, while the sum is 50.

The square root of 7491513938 is about 86553.5322098411. The cubic root of 7491513938 is about 1956.6952795336.

The spelling of 7491513938 in words is "seven billion, four hundred ninety-one million, five hundred thirteen thousand, nine hundred thirty-eight".