75490681 has 4 divisors (see below), whose sum is σ = 86275072. Its totient is φ = 64706292.

The previous prime is 75490663. The next prime is 75490691. The reversal of 75490681 is 18609457.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 75490681 - 2⁹ = 75490169 is a prime.

It is a super-2 number, since 2×75490681² = 11397685835687522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (75490631) 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, 5392185 + ... + 5392198.

It is an arithmetic number, because the mean of its divisors is an integer number (21568768).

Almost surely, 2^75490681 is an apocalyptic number.

It is an amenable number.

75490681 is a deficient number, since it is larger than the sum of its proper divisors (10784391).

75490681 is a wasteful number, since it uses less digits than its factorization.

75490681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10784390.

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 75490681 is about 8688.5373337519. The cubic root of 75490681 is about 422.6340151175.

The spelling of 75490681 in words is "seventy-five million, four hundred ninety thousand, six hundred eighty-one".