1954364397 has 16 divisors (see below), whose sum is σ = 2644125120. Its totient is φ = 1283839232.

The previous prime is 1954364393. The next prime is 1954364413. The reversal of 1954364397 is 7934634591.

It is a cyclic number.

It is not a de Polignac number, because 1954364397 - 2² = 1954364393 is a prime.

It is a super-2 number, since 2×1954364397² = 7639080392522347218, which contains 22 as substring.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1954364393) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86773 + ... + 106949.

It is an arithmetic number, because the mean of its divisors is an integer number (165257820).

Almost surely, 2^1954364397 is an apocalyptic number.

It is an amenable number.

1954364397 is a deficient number, since it is larger than the sum of its proper divisors (689760723).

1954364397 is a wasteful number, since it uses less digits than its factorization.

1954364397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20652.

The product of its digits is 2449440, while the sum is 51.

The square root of 1954364397 is about 44208.1937767197. The cubic root of 1954364397 is about 1250.2643487852.

The spelling of 1954364397 in words is "one billion, nine hundred fifty-four million, three hundred sixty-four thousand, three hundred ninety-seven".