1954289397 has 4 divisors (see below), whose sum is σ = 2605719200. Its totient is φ = 1302859596.

The previous prime is 1954289357. The next prime is 1954289401. The reversal of 1954289397 is 7939824591.

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: 7939824591 = 3 ⋅2646608197.

It is not a de Polignac number, because 1954289397 - 2¹⁰ = 1954288373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1954289317) 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, 325714897 + ... + 325714902.

It is an arithmetic number, because the mean of its divisors is an integer number (651429800).

Almost surely, 2^1954289397 is an apocalyptic number.

It is an amenable number.

1954289397 is a deficient number, since it is larger than the sum of its proper divisors (651429803).

1954289397 is an equidigital number, since it uses as much as digits as its factorization.

1954289397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 651429802.

The product of its digits is 4898880, while the sum is 57.

The square root of 1954289397 is about 44207.3455095417. The cubic root of 1954289397 is about 1250.2483553458.

The spelling of 1954289397 in words is "one billion, nine hundred fifty-four million, two hundred eighty-nine thousand, three hundred ninety-seven".