1989374501 has 4 divisors (see below), whose sum is σ = 2053547904. Its totient is φ = 1925201100.

The previous prime is 1989374483. The next prime is 1989374503. The reversal of 1989374501 is 1054739891.

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 a cyclic number.

It is not a de Polignac number, because 1989374501 - 2²⁶ = 1922265637 is a prime.

It is a super-2 number, since 2×1989374501² = 7915221810457998002, 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 (1989374503) 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, 32086655 + ... + 32086716.

It is an arithmetic number, because the mean of its divisors is an integer number (513386976).

Almost surely, 2^1989374501 is an apocalyptic number.

It is an amenable number.

1989374501 is a deficient number, since it is larger than the sum of its proper divisors (64173403).

1989374501 is an equidigital number, since it uses as much as digits as its factorization.

1989374501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64173402.

The product of its (nonzero) digits is 272160, while the sum is 47.

The square root of 1989374501 is about 44602.4046549062. The cubic root of 1989374501 is about 1257.6858719197.

The spelling of 1989374501 in words is "one billion, nine hundred eighty-nine million, three hundred seventy-four thousand, five hundred one".