1972990545 has 8 divisors (see below), whose sum is σ = 3156784896. Its totient is φ = 1052261616.

The previous prime is 1972990517. The next prime is 1972990549. The reversal of 1972990545 is 5450992791.

1972990545 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 1972990545 - 2⁷ = 1972990417 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1972990549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65766337 + ... + 65766366.

It is an arithmetic number, because the mean of its divisors is an integer number (394598112).

Almost surely, 2^1972990545 is an apocalyptic number.

1972990545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1972990545 is a deficient number, since it is larger than the sum of its proper divisors (1183794351).

1972990545 is a wasteful number, since it uses less digits than its factorization.

1972990545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131532711.

The product of its (nonzero) digits is 1020600, while the sum is 51.

The square root of 1972990545 is about 44418.3581979343. The cubic root of 1972990545 is about 1254.2236951781.

The spelling of 1972990545 in words is "one billion, nine hundred seventy-two million, nine hundred ninety thousand, five hundred forty-five".