1434378623 has 4 divisors (see below), whose sum is σ = 1435795608. Its totient is φ = 1432961640.

The previous prime is 1434378619. The next prime is 1434378661. The reversal of 1434378623 is 3268734341.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3268734341 = 23993 ⋅136237.

It is a cyclic number.

It is not a de Polignac number, because 1434378623 - 2² = 1434378619 is a prime.

It is a super-2 number, since 2×1434378623² = 4114884068238752258, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1434378613) 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, 706973 + ... + 708998.

It is an arithmetic number, because the mean of its divisors is an integer number (358948902).

Almost surely, 2^1434378623 is an apocalyptic number.

1434378623 is a deficient number, since it is larger than the sum of its proper divisors (1416985).

1434378623 is a wasteful number, since it uses less digits than its factorization.

1434378623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1416984.

The product of its digits is 290304, while the sum is 41.

The square root of 1434378623 is about 37873.1913495549. The cubic root of 1434378623 is about 1127.7718966755.

The spelling of 1434378623 in words is "one billion, four hundred thirty-four million, three hundred seventy-eight thousand, six hundred twenty-three".