140623451 has 2 divisors, whose sum is σ = 140623452. Its totient is φ = 140623450.

The previous prime is 140623447. The next prime is 140623453. The reversal of 140623451 is 154326041.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 140623451 - 2² = 140623447 is a prime.

It is a super-2 number, since 2×140623451² = 39549909942298802, which contains 22 as substring.

Together with 140623453, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 140623451.

It is not a weakly prime, because it can be changed into another prime (140623453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70311725 + 70311726.

It is an arithmetic number, because the mean of its divisors is an integer number (70311726).

Almost surely, 2^140623451 is an apocalyptic number.

140623451 is a deficient number, since it is larger than the sum of its proper divisors (1).

140623451 is an equidigital number, since it uses as much as digits as its factorization.

140623451 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 140623451 is about 11858.4759138770. The cubic root of 140623451 is about 520.0190463931.

Adding to 140623451 its reverse (154326041), we get a palindrome (294949492).

The spelling of 140623451 in words is "one hundred forty million, six hundred twenty-three thousand, four hundred fifty-one".