1354445391 has 16 divisors (see below), whose sum is σ = 1945974240. Its totient is φ = 833020800.

The previous prime is 1354445371. The next prime is 1354445399. The reversal of 1354445391 is 1935444531.

It is not a de Polignac number, because 1354445391 - 2¹⁰ = 1354444367 is a prime.

It is a super-2 number, since 2×1354445391² = 3669044634402285762, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1354445399) 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, 65005 + ... + 83273.

It is an arithmetic number, because the mean of its divisors is an integer number (121623390).

Almost surely, 2^1354445391 is an apocalyptic number.

1354445391 is a deficient number, since it is larger than the sum of its proper divisors (591528849).

1354445391 is a wasteful number, since it uses less digits than its factorization.

1354445391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20186.

The product of its digits is 129600, while the sum is 39.

The square root of 1354445391 is about 36802.7905327843. The cubic root of 1354445391 is about 1106.4212286647.

The spelling of 1354445391 in words is "one billion, three hundred fifty-four million, four hundred forty-five thousand, three hundred ninety-one".