75451989 has 4 divisors (see below), whose sum is σ = 100602656. Its totient is φ = 50301324.

The previous prime is 75451979. The next prime is 75451993. The reversal of 75451989 is 98915457.

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, and also an emirpimes, since its reverse is a distinct semiprime: 98915457 = 3 ⋅32971819.

It is not a de Polignac number, because 75451989 - 2¹⁵ = 75419221 is a prime.

It is a super-2 number, since 2×75451989² = 11386005288112242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75451919) 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, 12575329 + ... + 12575334.

It is an arithmetic number, because the mean of its divisors is an integer number (25150664).

Almost surely, 2^75451989 is an apocalyptic number.

It is an amenable number.

75451989 is a deficient number, since it is larger than the sum of its proper divisors (25150667).

75451989 is a wasteful number, since it uses less digits than its factorization.

75451989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25150666.

The product of its digits is 453600, while the sum is 48.

The square root of 75451989 is about 8686.3104365432. The cubic root of 75451989 is about 422.5617971534.

The spelling of 75451989 in words is "seventy-five million, four hundred fifty-one thousand, nine hundred eighty-nine".