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75009997 is a prime number
BaseRepresentation
bin1000111100010…
…00111111001101
312020010220101001
410132020333031
5123200304442
611235420301
71600401016
oct436107715
9166126331
1075009997
1139383137
1221154691
131270401a
149d6800d
1568ba2b7
hex4788fcd

75009997 has 2 divisors, whose sum is σ = 75009998. Its totient is φ = 75009996.

The previous prime is 75009959. The next prime is 75010021. The reversal of 75009997 is 79990057.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72777961 + 2232036 = 8531^2 + 1494^2 .

It is a cyclic number.

It is not a de Polignac number, because 75009997 - 223 = 66621389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75009937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37504998 + 37504999.

It is an arithmetic number, because the mean of its divisors is an integer number (37504999).

Almost surely, 275009997 is an apocalyptic number.

It is an amenable number.

75009997 is a deficient number, since it is larger than the sum of its proper divisors (1).

75009997 is an equidigital number, since it uses as much as digits as its factorization.

75009997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 178605, while the sum is 46.

The square root of 75009997 is about 8660.8311956763. The cubic root of 75009997 is about 421.7350691436.

The spelling of 75009997 in words is "seventy-five million, nine thousand, nine hundred ninety-seven".