1972553699 has 4 divisors (see below), whose sum is σ = 1972644864. Its totient is φ = 1972462536.

The previous prime is 1972553677. The next prime is 1972553701. The reversal of 1972553699 is 9963552791.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1972553699 - 2¹² = 1972549603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1972523699) 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, 7409 + ... + 63245.

It is an arithmetic number, because the mean of its divisors is an integer number (493161216).

Almost surely, 2^1972553699 is an apocalyptic number.

1972553699 is a deficient number, since it is larger than the sum of its proper divisors (91165).

1972553699 is an equidigital number, since it uses as much as digits as its factorization.

1972553699 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91164.

The product of its digits is 4592700, while the sum is 56.

The square root of 1972553699 is about 44413.4405219861. The cubic root of 1972553699 is about 1254.1311211499.

The spelling of 1972553699 in words is "one billion, nine hundred seventy-two million, five hundred fifty-three thousand, six hundred ninety-nine".