140387497 has 2 divisors, whose sum is σ = 140387498. Its totient is φ = 140387496.

The previous prime is 140387477. The next prime is 140387551. The reversal of 140387497 is 794783041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 133263936 + 7123561 = 11544^2 + 2669^2 .

It is a cyclic number.

It is not a de Polignac number, because 140387497 - 2⁷ = 140387369 is a prime.

It is not a weakly prime, because it can be changed into another prime (140387477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70193748 + 70193749.

It is an arithmetic number, because the mean of its divisors is an integer number (70193749).

Almost surely, 2^140387497 is an apocalyptic number.

It is an amenable number.

140387497 is a deficient number, since it is larger than the sum of its proper divisors (1).

140387497 is an equidigital number, since it uses as much as digits as its factorization.

140387497 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 169344, while the sum is 43.

The square root of 140387497 is about 11848.5229881197. The cubic root of 140387497 is about 519.7280345592.

The spelling of 140387497 in words is "one hundred forty million, three hundred eighty-seven thousand, four hundred ninety-seven".