140257969 has 2 divisors, whose sum is σ = 140257970. Its totient is φ = 140257968.

The previous prime is 140257967. The next prime is 140258003. The reversal of 140257969 is 969752041.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 98267569 + 41990400 = 9913^2 + 6480^2 .

It is a cyclic number.

It is not a de Polignac number, because 140257969 - 2¹ = 140257967 is a prime.

It is a super-2 number, since 2×140257969² = 39344595736009922, which contains 22 as substring.

Together with 140257967, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (140257967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70128984 + 70128985.

It is an arithmetic number, because the mean of its divisors is an integer number (70128985).

Almost surely, 2^140257969 is an apocalyptic number.

It is an amenable number.

140257969 is a deficient number, since it is larger than the sum of its proper divisors (1).

140257969 is an equidigital number, since it uses as much as digits as its factorization.

140257969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 136080, while the sum is 43.

The square root of 140257969 is about 11843.0557289916. The cubic root of 140257969 is about 519.5681436646.

The spelling of 140257969 in words is "one hundred forty million, two hundred fifty-seven thousand, nine hundred sixty-nine".