140387551 has 2 divisors, whose sum is σ = 140387552. Its totient is φ = 140387550.

The previous prime is 140387497. The next prime is 140387573. The reversal of 140387551 is 155783041.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 140387551 - 2¹³ = 140379359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140387851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70193775 + 70193776.

It is an arithmetic number, because the mean of its divisors is an integer number (70193776).

Almost surely, 2^140387551 is an apocalyptic number.

140387551 is a deficient number, since it is larger than the sum of its proper divisors (1).

140387551 is an equidigital number, since it uses as much as digits as its factorization.

140387551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16800, while the sum is 34.

The square root of 140387551 is about 11848.5252668845. The cubic root of 140387551 is about 519.7281011969.

The spelling of 140387551 in words is "one hundred forty million, three hundred eighty-seven thousand, five hundred fifty-one".