140398057 has 2 divisors, whose sum is σ = 140398058. Its totient is φ = 140398056.

The previous prime is 140398033. The next prime is 140398067. The reversal of 140398057 is 750893041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 129481641 + 10916416 = 11379^2 + 3304^2 .

It is an emirp because it is prime and its reverse (750893041) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 140398057 - 2¹⁵ = 140365289 is a prime.

It is a super-2 number, since 2×140398057² = 39423228818750498, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (140398067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70199028 + 70199029.

It is an arithmetic number, because the mean of its divisors is an integer number (70199029).

Almost surely, 2^140398057 is an apocalyptic number.

It is an amenable number.

140398057 is a deficient number, since it is larger than the sum of its proper divisors (1).

140398057 is an equidigital number, since it uses as much as digits as its factorization.

140398057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 140398057 is about 11848.9686049040. The cubic root of 140398057 is about 519.7410656115.

The spelling of 140398057 in words is "one hundred forty million, three hundred ninety-eight thousand, fifty-seven".